Roth, C. B. (1947). The handbook of selling. Prentice-Hall.
Cita Chicago (17th ed.)Roth, Charles B. The Handbook of Selling. New York: Prentice-Hall, 1947.
Cita MLA (9th ed.)Roth, Charles B. The Handbook of Selling. Prentice-Hall, 1947.
Atenció: Aquestes cites poden no estar 100% correctes.