APA
Alexander M., . (1987). <The> Encyclopedia of animal biology. New York: Facts On File.
Chicago
Alexander McNeil, . 1987. <The> Encyclopedia of animal biology. New York: Facts On File.
Harvard
Alexander M., . (1987). <The> Encyclopedia of animal biology. New York: Facts On File.
MLA
Alexander McNeil, . <The> Encyclopedia of animal biology. New York: Facts On File. 1987.