APA (7th ed.) Citation

Mehl, M. A., Mills, H. H., & Douglas, H. R. (1950). Teaching in elementary school. Ronald Press.

Chicago Style (17th ed.) Citation

Mehl, Marie A., Hubert H. Mills, and Harl R. Douglas. Teaching in Elementary School. New York: Ronald Press, 1950.

MLA (9th ed.) Citation

Mehl, Marie A., et al. Teaching in Elementary School. Ronald Press, 1950.