APA (7th ed.) Citation

Martin, R., & Gammell, S. (1989). Will's mammoth. Putnam.

Chicago Style (17th ed.) Citation

Martin, Rafe, and Stephen Gammell. Will's Mammoth. New York: Putnam, 1989.

MLA (9th ed.) Citation

Martin, Rafe, and Stephen Gammell. Will's Mammoth. Putnam, 1989.