APA
Lefever D. W., Turrell A. M. & Weitzel H. I. (1950). Principles and techniques of guidance. New York: Ronald Press.
Chicago
Lefever D Welty, Turrell Archie M and Weitzel Henry I. 1950. Principles and techniques of guidance. New York: Ronald Press.
Harvard
Lefever D. W., Turrell A. M. and Weitzel H. I. (1950). Principles and techniques of guidance. New York: Ronald Press.
MLA
Lefever D Welty, Turrell Archie M and Weitzel Henry I. Principles and techniques of guidance. New York: Ronald Press. 1950.
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