Παραπομπή σε μορφή APA (7η εκδ.)

Wheeler, H. (1971). Democracy in a revolutionary era: The political order today. Penguin.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wheeler, Harvey. Democracy in a Revolutionary Era: The Political Order Today. Harmondsworth: Penguin, 1971.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wheeler, Harvey. Democracy in a Revolutionary Era: The Political Order Today. Penguin, 1971.