Tschohl, J. (2003). e-Service: Speed, technology and price built around service. Pentagon.
استشهاد بنمط شيكاغوTschohl, John. E-Service: Speed, Technology and Price Built Around Service. New Delhi: Pentagon, 2003.
MLA استشهادTschohl, John. E-Service: Speed, Technology and Price Built Around Service. Pentagon, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.