Gaya APA

Weitz, B, , A, W, B, , A. (2007). Selling : Building partnerships.-- (Ed. 6.--). America: McGraw-Hill.

Gaya MLA

Weitz, Barton, , A., Weitz,, Barton, , A.. "Selling : Building partnerships.--". Ed. 6.-- America: McGraw-Hill, 2007. Buku.