Citazione Stile APA (7a Edizione)

Johnson, C. (1986). The practical zone system: A simple guide to photographic control. Focal Press.

Citazione stile Chigago Style (17a edizione)

Johnson, Chris. The Practical Zone System: A Simple Guide to Photographic Control. Boston: Focal Press, 1986.

Citatione MLA (9a ed.)

Johnson, Chris. The Practical Zone System: A Simple Guide to Photographic Control. Focal Press, 1986.