APA

Walter P. A. F., . (1949). The social sciences. New York: Van Nostrand.

Chicago

Walter Paul Alfred Francis, . 1949. The social sciences. New York: Van Nostrand.

Harvard

Walter P. A. F., . (1949). The social sciences. New York: Van Nostrand.

MLA

Walter Paul Alfred Francis, . The social sciences. New York: Van Nostrand. 1949.