APA (7th ed.) Citation

Lefever, D. W., Turrell, A. M., & Weit-Zel, H. I. (1950). Principles and techniques of guidance (Rev. ed.). Ronald Press.

Chicago Style (17th ed.) Citation

Lefever, David Welty, Archie M. Turrell, and Henry I. Weit-Zel. Principles and Techniques of Guidance. Rev. ed. New York: Ronald Press, 1950.

MLA (9th ed.) Citation

Lefever, David Welty, et al. Principles and Techniques of Guidance. Rev. ed. Ronald Press, 1950.