Citazione Stile APA (7a Edizione)

Sharp, D. (2003). Call center operation: Design, operation and maintenence. Digital Press.

Citazione stile Chigago Style (17a edizione)

Sharp, Duane. Call Center Operation: Design, Operation and Maintenence. Amsterdam: Digital Press, 2003.

Citatione MLA (9a ed.)

Sharp, Duane. Call Center Operation: Design, Operation and Maintenence. Digital Press, 2003.