APA (7th ed.) Citation

Bagley, W. C., & Keith, J. A. H. (1924). An introduction to teaching. Macmillan.

Chicago Style (17th ed.) Citation

Bagley, William C., and John Alexander Hull Keith. An Introduction to Teaching. New York: Macmillan, 1924.

MLA (9th ed.) Citation

Bagley, William C., and John Alexander Hull Keith. An Introduction to Teaching. Macmillan, 1924.