Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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