APA (7th ed.) Citation

Varis, L. (2011). Mastering exposure and the zone system for digital photographers. Course Technology Cengage Learning.

Chicago Style (17th ed.) Citation

Varis, Lee. Mastering Exposure and the Zone System for Digital Photographers. Australia: Course Technology Cengage Learning, 2011.

MLA (9th ed.) Citation

Varis, Lee. Mastering Exposure and the Zone System for Digital Photographers. Course Technology Cengage Learning, 2011.