Cita APA (7th ed.)

Richards, I. A. (1957). German Through pictures (Primera edición.). Pocket Books, Inc.

Cita Chicago (17th ed.)

Richards, I. A. German Through Pictures. Primera edición. New York: Pocket Books, Inc, 1957.

Cita MLA (8th ed.)

Richards, I. A. German Through Pictures. Primera edición. Pocket Books, Inc, 1957.