APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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