Παραπομπή APA

Tschohl, J. (2003). e-Service: Speed, technology and price built around service. Pentagon.

Παραπομπή Chicago Style

Tschohl, John. E-Service: Speed, Technology and Price Built Around Service. New Delhi: Pentagon, 2003.

Παραπομπή MLA

Tschohl, John. E-Service: Speed, Technology and Price Built Around Service. Pentagon, 2003.