APA

Noble E., . (1926). Purposive evolution. New York: Henry Holt and Company.

Chicago

Noble Edmund, . 1926. Purposive evolution. New York: Henry Holt and Company.

Harvard

Noble E., . (1926). Purposive evolution. New York: Henry Holt and Company.

MLA

Noble Edmund, . Purposive evolution. New York: Henry Holt and Company. 1926.