APA (7th ed.) Citation

Willey, R. D. V., & Strong, W. M. (1957). Group procedures in guidance ([1st ed.].). Harper.

Chicago Style (17th ed.) Citation

Willey, Roy De Verl, and W. Melvin Strong. Group Procedures in Guidance. [1st ed.]. New York: Harper, 1957.

MLA (9th ed.) Citation

Willey, Roy De Verl, and W. Melvin Strong. Group Procedures in Guidance. [1st ed.]. Harper, 1957.