APA (7th ed.) Citation

Simpson, G. G. (1961). The major features of evolution (3. print.). Columbia Univ. Press.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. The Major Features of Evolution. 3. print. New York: Columbia Univ. Press, 1961.

MLA (9th ed.) Citation

Simpson, George Gaylord. The Major Features of Evolution. 3. print. Columbia Univ. Press, 1961.