APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Lefever, David Welty, D. W. Lefever, Archie M. Turrell, and Henry I. Weitzel. 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.