Johnston, M. W., & Marshall, G. W. (2008). Relationship selling (2nd ed.). New York, NY: McGraw-Hill/Irwin.
Trích dẫn kiểu ChicagoJohnston, Mark W., và Greg W. Marshall. Relationship Selling. 2nd ed. New York, NY: McGraw-Hill/Irwin, 2008.
MLA CitationJohnston, Mark W., và Greg W. Marshall. Relationship Selling. 2nd ed. New York, NY: McGraw-Hill/Irwin, 2008.
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