The meaning of evolution

MLA

Simpson, George Gaylord. The Meaning of Evolution. 6th pr. New York: New American Library, 1956.

APA

Simpson, G. Gaylord. (1956). The meaning of evolution. 6th pr. New York: New American Library.

Chicago

Simpson, George Gaylord, The Meaning of Evolution. 6th pr. New York: New American Library, 1956.