APA (7th ed.) Citation

Warfel, H. R., Mathews, E. G., & Bushman, J. C. (1949). American college English: A handbook of usage and composition. American Book Co.

Chicago Style (17th ed.) Citation

Warfel, Harry R., Ernst G. Mathews, and John C. Bushman. American College English: A Handbook of Usage and Composition. New York [u.a.]: American Book Co, 1949.

MLA (9th ed.) Citation

Warfel, Harry R., et al. American College English: A Handbook of Usage and Composition. American Book Co, 1949.