APA
Johnston M. W. &. M. G. W., . (2005). Relationship selling and sales management. Boston: McGraw-Hill Irwin.
Chicago
Johnston Mark W & Marshall Greg W, . 2005. Relationship selling and sales management. Boston: McGraw-Hill Irwin.
Harvard
Johnston M. W. &. M. G. W., . (2005). Relationship selling and sales management. Boston: McGraw-Hill Irwin.
MLA
Johnston Mark W & Marshall Greg W, . Relationship selling and sales management. Boston: McGraw-Hill Irwin. 2005.