MLA

Christenson, Gary A, Eric Hollander, and Dan J Stein. Trichotillomania. Washington, DC: American Psychiatric Press, 1999.

APA

Christenson, G. A, Hollander, E., & Stein, D. J. (1999). Trichotillomania. Washington, DC: American Psychiatric Press.

Chicago

Christenson, Gary A. ed., Eric Hollander ed., and Dan J Stein ed. Trichotillomania. Washington, DC: American Psychiatric Press, 1999.