APA (7th ed.) Citation
Witte, K., & Meyer, G. e. a. (2001). Effective health risk messages: A step-by-step guide. Sage.
Chicago Style (17th ed.) Citation
Witte, Kim, and Gary et. al Meyer. Effective Health Risk Messages: A Step-by-step Guide. London: Sage, 2001.
MLA (9th ed.) Citation
Witte, Kim, and Gary et. al Meyer. Effective Health Risk Messages: A Step-by-step Guide. Sage, 2001.
Warning: These citations may not always be 100% accurate.