APA (7th ed.) Citation

Cowan, E. M., Betz, A., & Charters, W. W. (1923). Essential language habits. Silver, Burdett & Co.

Chicago Style (17th ed.) Citation

Cowan, Esther Marshall, Annette Betz, and W. W. Charters. Essential Language Habits. New York, Newark [etc.]: Silver, Burdett & Co, 1923.

MLA (8th ed.) Citation

Cowan, Esther Marshall, et al. Essential Language Habits. Silver, Burdett & Co, 1923.