APA-viite (7. p.)

KARR R. (1998). COMPLETE IDIOT`S GUIDE TO GREAT CUSTOMER SERVICE. PRENTICE -HALL INTERNATIONAL, INC.

Chicago-viite (17. p.)

KARR R. COMPLETE IDIOT`S GUIDE TO GREAT CUSTOMER SERVICE. NEW DELHI: PRENTICE -HALL INTERNATIONAL, INC, 1998.

MLA-viite (9. p.)

KARR R. COMPLETE IDIOT`S GUIDE TO GREAT CUSTOMER SERVICE. PRENTICE -HALL INTERNATIONAL, INC, 1998.