APA (7th ed.) Citation

Simpson, G. G. (1967). Principles of animal taxonomy (3.print.). Columbia Univ. Pr.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. Principles of Animal Taxonomy. 3.print. New York: Columbia Univ. Pr, 1967.

MLA (9th ed.) Citation

Simpson, George Gaylord. Principles of Animal Taxonomy. 3.print. Columbia Univ. Pr, 1967.