APA Style

Combs, A, W., Snygg, D. (1959). Individual behavior : a perceptual approach to behavior, revised edition (1). New York: Harper & Row Publishers.

MLA Style

Combs, Arthur, W.., Snygg, Donald. "Individual behavior : a perceptual approach to behavior, revised edition". 1 New York: Harper & Row Publishers, 1959. Text.