APA

Owen R., . (1972). Studies in the theory of imperialism. London: Longman.

Chicago

Owen Roger, . 1972. Studies in the theory of imperialism. London: Longman.

Harvard

Owen R., . (1972). Studies in the theory of imperialism. London: Longman.

MLA

Owen Roger, . Studies in the theory of imperialism. London: Longman. 1972.