Cita APA (7a ed.)

Johnson, C. (2017). The practical zone system for film and digital photography: Classic tool, universal applications (Sixth edition.). Routledge.

Cita Chicago Style (17a ed.)

Johnson, Chris. The Practical Zone System for Film and Digital Photography: Classic Tool, Universal Applications. Sixth edition. New York: Routledge, 2017.

Cita MLA (8a ed.)

Johnson, Chris. The Practical Zone System for Film and Digital Photography: Classic Tool, Universal Applications. Sixth edition. Routledge, 2017.