Cita APA (7th ed.)

Lambert, D., & Diagram Group. (1987). The field guide to early man. Facts on File.

Cita Chicago (17th ed.)

Lambert, David, i Diagram Group. The Field Guide to Early Man. New York: Facts on File, 1987.

Cita MLA (9th ed.)

Lambert, David, i Diagram Group. The Field Guide to Early Man. Facts on File, 1987.