Sack, S. M. (1981). The salesperson's legal guide. Prentice Hall.
Cita Chicago (17th ed.)Sack, Steven Mitchell. The Salesperson's Legal Guide. Prentice Hall, 1981.
Cita MLA (9th ed.)Sack, Steven Mitchell. The Salesperson's Legal Guide. Prentice Hall, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.