Manning, G. L., & Reece, B. L. (2007). Selling today: Creating customer value (Tenth edition.). Pearson Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Manning, Gerald L., agus Barry L. Reece. Selling Today: Creating Customer Value. Tenth edition. Upper Saddle River, N.J.: Pearson Prentice Hall, 2007.
Lua MLA (8ú heag.)Manning, Gerald L., agus Barry L. Reece. Selling Today: Creating Customer Value. Tenth edition. Pearson Prentice Hall, 2007.
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