APA aipamena

 Johnston, M. W. (2008).  Relationship selling.  McGraw-Hill/Irwin.

Chicago Style aipamena

 Johnston, Mark W.  Relationship Selling.  McGraw-Hill/Irwin, 2008.

MLA aipamena

 Johnston, Mark W.  Relationship Selling.  McGraw-Hill/Irwin, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.