Gaya APA

microbiology. (1999). Virginia: [s.n.].

Gaya Chicago

microbiology. 4. Virginia: [s.n.], 1999. Text.

Gaya MLA

microbiology. 4. Virginia: [s.n.], 1999. Text.

Gaya Turabian

microbiology. Virginia: [s.n.], 1999. Print.