Gaya APA

Weitz, B, A., Castleberry, S, B. (2009). SELLING; Building Partnerships (7th). New York: MCGRAW-HILL.

Gaya MLA

Weitz, Barton, A.., Castleberry, Stephen, B.. "SELLING; Building Partnerships". 7th New York: MCGRAW-HILL, 2009. Text.