APA (7th ed.) Citation

Clark, A. M., & Knox, J. (1931). Progress in English (1. ed.). Doubleday, Doran.

Chicago Style (17th ed.) Citation

Clark, A. Mortimer, and Jaxon Knox. Progress in English. 1. ed. Garden City, NY: Doubleday, Doran, 1931.

MLA (9th ed.) Citation

Clark, A. Mortimer, and Jaxon Knox. Progress in English. 1. ed. Doubleday, Doran, 1931.