Παραπομπή APA

Baer, E. E. (1972). Salesmanship. Mcgraw Hill.

Παραπομπή Chicago Style

Baer, Earl E. Salesmanship. New York: Mcgraw Hill, 1972.

Παραπομπή MLA

Baer, Earl E. Salesmanship. Mcgraw Hill, 1972.