Baer, E. E. (1972). Salesmanship. McGraw-Hill.
Cita Chicago (17th ed.)Baer, Earl E. Salesmanship. New York: McGraw-Hill, 1972.
Cita MLA (8th ed.)Baer, Earl E. Salesmanship. McGraw-Hill, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.
Baer, E. E. (1972). Salesmanship. McGraw-Hill.
Cita Chicago (17th ed.)Baer, Earl E. Salesmanship. New York: McGraw-Hill, 1972.
Cita MLA (8th ed.)Baer, Earl E. Salesmanship. McGraw-Hill, 1972.