APA

Wolfe M., . (1972). The economic causes of imperialism. New York [u.a.]: Wiley.

Chicago

Wolfe Martin, . 1972. The economic causes of imperialism. New York [u.a.]: Wiley.

Harvard

Wolfe M., . (1972). The economic causes of imperialism. New York [u.a.]: Wiley.

MLA

Wolfe Martin, . The economic causes of imperialism. New York [u.a.]: Wiley. 1972.