Cita APA

Roth, C. B. (1970). Secrets of closing sales (4th ed.).

Chicago Edition Citation

Roth, Charles B. Secrets of Closing Sales. 4th ed. 1970.

Cita MLA

Roth, Charles B. Secrets of Closing Sales. 4th ed. 1970.

Atenció: Aquestes cites poden no estar 100% correctes.