Gaya APA

Katz, D, L. (2014). Jekel’s Epidemiology, Biostatistics, Preventive Medicine, and Public Health (Ebook) . : Elsevier.

Gaya MLA

Katz, David, L.. "Jekel’s Epidemiology, Biostatistics, Preventive Medicine, and Public Health (Ebook)". : Elsevier, 2014. Text.