APA (7th ed.) Citation

Grill, T., & Scanlon, M. (1981). 25 projects to improve your photography. Amphoto.

Chicago Style (17th ed.) Citation

Grill, Tom, and Mark Scanlon. 25 Projects to Improve Your Photography. New York, N.Y.: Amphoto, 1981.

MLA (9th ed.) Citation

Grill, Tom, and Mark Scanlon. 25 Projects to Improve Your Photography. Amphoto, 1981.