APA (7e ed.) Bronvermelding

Leterman, E. G. (1974). Sales and sales management (1a. ed.). Alexander Hamilton Institute.

Chicago (17e ed.) Bronvermelding

Leterman, Elmer G. Sales and Sales Management. 1a. ed. Nueva York: Alexander Hamilton Institute, 1974.

MLA (9e ed.) Bronvermelding

Leterman, Elmer G. Sales and Sales Management. 1a. ed. Alexander Hamilton Institute, 1974.