APA

Swearingen R., . (1971). Leaders of the communist world. New York: The Free.

Chicago

Swearingen Rodger, . 1971. Leaders of the communist world. New York: The Free.

Harvard

Swearingen R., . (1971). Leaders of the communist world. New York: The Free.

MLA

Swearingen Rodger, . Leaders of the communist world. New York: The Free. 1971.