APA

Calvocoressi P., . (1968). International politics since 1945. New York: F. A. Praeger.

Chicago

Calvocoressi Peter, . 1968. International politics since 1945. New York: F. A. Praeger.

Harvard

Calvocoressi P., . (1968). International politics since 1945. New York: F. A. Praeger.

MLA

Calvocoressi Peter, . International politics since 1945. New York: F. A. Praeger. 1968.