Varis, L. (2011). Mastering exposure and the zone system for digital photographers. Course Technology Cengage Learning.
Chicago-Zitierstil (17. Ausg.)Varis, Lee. Mastering Exposure and the Zone System for Digital Photographers. Australia: Course Technology Cengage Learning, 2011.
MLA-Zitierstil (9. Ausg.)Varis, Lee. Mastering Exposure and the Zone System for Digital Photographers. Course Technology Cengage Learning, 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.