Callahan

MLA

Callahan, H, and J Szarkowski. Callahan. New York: Aperture, 1976.

APA

Callahan, H., & Szarkowski, J. (1976). Callahan. New York: Aperture.

Chicago

Callahan, H., and J Szarkowski. Callahan. New York: Aperture, 1976.