APA (7th ed.) Citation

Burgel, P. H., & Hartwig, M. (1990). A family of Gorillas. A & C Black Pub..

Chicago Style (17th ed.) Citation

Burgel, Paul H., and Manfred Hartwig. A Family of Gorillas. London: A & C Black Pub., 1990.

MLA (9th ed.) Citation

Burgel, Paul H., and Manfred Hartwig. A Family of Gorillas. A & C Black Pub., 1990.