Cita APA (7a ed.)

Pennell, M. E., Cusack, A. M., & Davis, M. (1936). Friends: A primer (New edition.). Ginn and Compay.

Cita Chicago Style (17a ed.)

Pennell, Mary E., Alice M. Cusack, y Marguerite Davis. Friends: A Primer. New edition. Boston New York Chicago London Atlanta Dallas Columbus San Francisco: Ginn and Compay, 1936.

Cita MLA (9a ed.)

Pennell, Mary E., et al. Friends: A Primer. New edition. Ginn and Compay, 1936.