Permission to Use Sigma Logo

If you are an Sigma member, go to The Circle to download the chapter style guide and a JPEG file of the Sigma logo. If you would like a vector image of the logo or crest, complete the form included in the style guide and your request will be reviewed as soon as possible.

If you are not an Sigma member and would like to request use of Sigma's official logo, contact In your email, provide detailed information regarding your intended use. Permission to use the logo or crest is granted on a case-by-case basis, and reasonable notice should be given. Approvals are for one-time use only.

Sigma in the news   

Updated Sigma book addresses incivility and bullying in the workplace and provides strategies for conflict resolution

Toxic Nursing: Managing Bullying, Bad Attitudes and Total Turmoil provides strategies, tools, and techniques for new and experienced nurse leaders to defuse conflict and create a healthy work environment.

Toxic Nursing: Managing Bullying, Bad Attitudes, and Total Turmoil book coverINDIANAPOLIS—Nurse managers lead the largest healthcare workforce in the industry. They not only need to be clinically competent, but they also have to be adept at relating to others and be gifted administrators. But in a profession that is prone to workplace conflict, incivility, bullying, and meanness, too few nurse leaders have been trained in its resolution. The second edition of Toxic Nursing: Managing Bullying, Bad Attitudes, and Total Turmoil from Sigma Nursing aims to change that.

In this updated edition, author Cheryl Dellasega provides strategies, tools, and techniques for new and experienced nurse leaders to defuse conflict and create a healthy work environment. Each chapter highlights issues that contribute to a toxic work environment and provides scenarios, insights, and reflections to guide nurse leaders on a path toward transformational leadership. This updated edition contains a new chapter on social media, electronic communication, and professionalism, as well as revamped examples and a new appendix about compassion fatigue.

Toxic Nursing is meant to help “nurses not only survive the challenges of healthcare today but thrive and develop professionally,” said author Cheryl Dellasega.

To download a free sample chapter from this book, visit the Sigma Repository.

This book is available to purchase at

Toxic Nursing: Managing Bullying, Bad Attitudes, and Total Turmoil, Second Edition
By Cheryl Dellasega, PhD, RN, CRNP
Published by Sigma, 2020
ISBN-13: 9781948057592
EPUB ISBN: 9781948057608
PDF ISBN: 9781948057615
MOBI ISBN: 9781948057622
Price: US $39.95
Trade paperback, 384 pages
Trim size: 6x9

About the author:

CHERYL DELLASEGA, PhD, RN, CRNP, is a Professor in the Department of Humanities at Penn State College of Medicine. An award-winning author, speaker, and researcher—and founder of Club and Camp Ophelia—she has spent much of her career helping women and girls confront and overcome bullying and relational aggression. She has worked clinically as a nurse practitioner and is an international expert on family relationships.

About Sigma:
The Sigma Theta Tau International Honor Society of Nursing (Sigma) is a nonprofit organization whose mission is advancing world health and celebrating nursing excellence in scholarship, leadership, and service. Founded in 1922, Sigma has more than 135,000 active members in over 100 countries and territories. Members include practicing nurses, instructors, researchers, policymakers, entrepreneurs, and others. Sigma’s more than 550 chapters are located at more than 700 institutions of higher education throughout Armenia, Australia, Botswana, Brazil, Canada, Colombia, England, Eswatini, Ghana, Hong Kong, Ireland, Israel, Jamaica, Japan, Jordan, Kenya, Lebanon, Malawi, Mexico, the Netherlands, Nigeria, Pakistan, Philippines, Portugal, Puerto Rico, Scotland, Singapore, South Africa, South Korea, Sweden, Taiwan, Tanzania, Thailand, the United States, and Wales.

Learn more at