Παραπομπή σε μορφή APA (7η εκδ.)

Ardrey, R. (1970). The social contract: A personal enquiry into the evolutionary sources of order and disorder. Collins.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ardrey, Robert. The Social Contract: A Personal Enquiry into the Evolutionary Sources of Order and Disorder. London: Collins, 1970.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ardrey, Robert. The Social Contract: A Personal Enquiry into the Evolutionary Sources of Order and Disorder. Collins, 1970.