APA

Ardrey R., . (1970). The social contract: a personal inquiry into the evolutionary sources of order and disorder. New York: Atheneum.

Chicago

Ardrey Robert, . 1970. The social contract: a personal inquiry into the evolutionary sources of order and disorder. New York: Atheneum.

Harvard

Ardrey R., . (1970). The social contract: a personal inquiry into the evolutionary sources of order and disorder. New York: Atheneum.

MLA

Ardrey Robert, . The social contract: a personal inquiry into the evolutionary sources of order and disorder. New York: Atheneum. 1970.