APA (7e ed.) Bronvermelding

Beckman, R. O. (1952). How to train supervisors; manual and outlines for determinate discussion (4th rev. ed.). Harper.

Chicago (17e ed.) Bronvermelding

Beckman, R O. How to Train Supervisors; Manual and Outlines for Determinate Discussion. 4th rev. ed. New York: Harper, 1952.

MLA (9e ed.) Bronvermelding

Beckman, R O. How to Train Supervisors; Manual and Outlines for Determinate Discussion. 4th rev. ed. Harper, 1952.