MLA

Stroebel, L, H Todd, and R Zakia. Visual Concepts for Photographers. London: Focal Press, 1980.

APA

Stroebel, L., Todd, H., & Zakia, R. (1980). Visual concepts for photographers. London: Focal Press.

Chicago

Stroebel, L., H Todd, and R Zakia. Visual Concepts for Photographers. London: Focal Press, 1980.