APA

Koebner R., Schmidt H. D., . (1965). Imperialism. Cambridge [u.a.]: Cambridge Univ. Press.

Chicago

Koebner Richard, Schmidt Helmut Dan, . 1965. Imperialism. Cambridge [u.a.]: Cambridge Univ. Press.

Harvard

Koebner R., Schmidt H. D., . (1965). Imperialism. Cambridge [u.a.]: Cambridge Univ. Press.

MLA

Koebner Richard, Schmidt Helmut Dan, . Imperialism. Cambridge [u.a.]: Cambridge Univ. Press. 1965.