APA aipamena

Barratt Brown, M. (1974). The economics of imperialism. Penguin Education.

Chicago Style aipamena

Barratt Brown, Michael. The Economics of Imperialism. Harmondsworth: Penguin Education, 1974.

MLA aipamena

Barratt Brown, Michael. The Economics of Imperialism. Penguin Education, 1974.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.