APA (7e ed.) Bronvermelding
Varis, L. (2011). Mastering exposure and the zone system for digital photographers. Course Technology PTR.
Chicago (17e ed.) Bronvermelding
Varis, Lee. Mastering Exposure and the Zone System for Digital Photographers. Boston, Mass., U.S.A.: Course Technology PTR, 2011.
MLA (9e ed.) Bronvermelding
Varis, Lee. Mastering Exposure and the Zone System for Digital Photographers. Course Technology PTR, 2011.
Let op: Deze citaties zijn niet altijd 100% accuraat.