Gaya APA

Webb, P., Page, C, B, &, A. (2018). Essential Epidemiology: An Introduction for Students and Health Professionals (3). New York: Cambridge University press.

Gaya MLA

Webb, Penny., Page, Chris, Bain, &, Andrew. "Essential Epidemiology: An Introduction for Students and Health Professionals". 3 New York: Cambridge University press, 2018. Text.