Cita APA (7a ed.)

Schiffman, S. (2013). Secrets of selling services: Everything you need to sell what your customer can't see - from pitch to close (1st edition.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Schiffman, Stephan. Secrets of Selling Services: Everything You Need to Sell What Your Customer Can't See - from Pitch to Close. 1st edition. New York: McGraw-Hill, 2013.

Cita MLA (9a ed.)

Schiffman, Stephan. Secrets of Selling Services: Everything You Need to Sell What Your Customer Can't See - from Pitch to Close. 1st edition. McGraw-Hill, 2013.