APA
George K. Hirst, . (1971). Virology. New York: Academic press.
Chicago
George K. Hirst, . 1971. Virology. New York: Academic press.
Harvard
George K. Hirst, . (1971). Virology. New York: Academic press.
MLA
George K. Hirst, . Virology. New York: Academic press. 1971.