Franklin

MLA

Cravens, Hamilton. The Triumph of Evolution : American Scientists and the Heredity-environment Controversy, 1900-1941. Philadelphia: University of Pennsylvania Press, 1978.

APA

Cravens, H. (1978). The triumph of evolution : American scientists and the heredity-environment controversy, 1900-1941. Philadelphia: University of Pennsylvania Press.

Chicago

Cravens, Hamilton. The Triumph of Evolution: American Scientists and the Heredity-Environment Controversy, 1900-1941. Philadelphia: University of Pennsylvania Press, 1978.