Cita APA (7a ed.)

Hales, D., & Koop, C. E. (1989). Depression. Chelsea House.

Cita Chicago Style (17a ed.)

Hales, Dianne, y C. Everett Koop. Depression. New York ; Philadelphia: Chelsea House, 1989.

Cita MLA (9a ed.)

Hales, Dianne, y C. Everett Koop. Depression. Chelsea House, 1989.