E-Services

MLA

Evanschitzky, Heiner, and Gopalkrishnan R Iyer. E-services. DUV, 2007.

APA

Evanschitzky, H., & Iyer, G. R. (2007). E-Services. DUV.

Chicago

Evanschitzky, Heiner, and Gopalkrishnan R Iyer. E-Services. : DUV, 2007.