APA

Jacobsen G. A., . (1965). Political Science. New York: By Barnes &Noble,Inc.

Chicago

Jacobsen G A, . 1965. Political Science. New York: By Barnes &Noble,Inc.

Harvard

Jacobsen G. A., . (1965). Political Science. New York: By Barnes &Noble,Inc.

MLA

Jacobsen G A, . Political Science. New York: By Barnes &Noble,Inc. 1965.