Johnson, C. (2007). The practical zone system : for film and digital photography: A simple guide to photographic control (4th ed.). Elsevier/Focal Press.
芝加哥风格引文Johnson, Chris. The Practical Zone System : For Film and Digital Photography: A Simple Guide to Photographic Control. 4th ed. Boston: Elsevier/Focal Press, 2007.
MLA引文Johnson, Chris. The Practical Zone System : For Film and Digital Photography: A Simple Guide to Photographic Control. 4th ed. Elsevier/Focal Press, 2007.
警告：这些引文格式不一定是100％准确.