Gaya APA

Ryan, K, J. (1994). Sherris : MEDICAL MICROBIOLOGY : An Introduction to Infectious Diseases (Ed. 3). London: Prentice Hall.

Gaya MLA

Ryan, Kenneth, J. "Sherris : MEDICAL MICROBIOLOGY : An Introduction to Infectious Diseases". Ed. 3 London: Prentice Hall, 1994. Text.