Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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