Gaya APA

Ryan, K, J., Ray, G, C. (2004). Sherris Medical Microbiology : An Introduction to Infectious Diseases (4). : McGrawHill.

Gaya MLA

Ryan, Kenneth, J.., Ray, George, C.. "Sherris Medical Microbiology : An Introduction to Infectious Diseases". 4 : McGrawHill, 2004. Text.