Johnston, M. W., & Marshall, G. W. (2008). Relationship selling. Boston: McGraw-Hill/Irwin.
Chicago Stili AlıntıJohnston, Mark W., and Greg W. Marshall. Relationship Selling. Boston: McGraw-Hill/Irwin, 2008.
MLA AlıntıJohnston, Mark W., and Greg W. Marshall. Relationship Selling. Boston: McGraw-Hill/Irwin, 2008.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..