APA (7th ed.) Citation

Sterling, E. L., Lindahl, H. M., & Koch, K. (1950). English is our language. D.C. Heath.

Chicago Style (17th ed.) Citation

Sterling, Edna L., Hannah M. Lindahl, and Katharine Koch. English Is Our Language. Boston: D.C. Heath, 1950.

MLA (8th ed.) Citation

Sterling, Edna L., et al. English Is Our Language. D.C. Heath, 1950.