APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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