APA aipamena

 Heil, G. (2006).  Employee management and customer service in the retail industry.  Wiley.

Chicago Style aipamena

 Heil, Gary.  Employee Management and Customer Service in the Retail Industry.  Wiley, 2006.

MLA aipamena

 Heil, Gary.  Employee Management and Customer Service in the Retail Industry.  Wiley, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.