APA

Zink H., . (1951). Government and politics in the United States. New York: Macmillan.

Chicago

Zink Harolf, . 1951. Government and politics in the United States. New York: Macmillan.

Harvard

Zink H., . (1951). Government and politics in the United States. New York: Macmillan.

MLA

Zink Harolf, . Government and politics in the United States. New York: Macmillan. 1951.