Economy, P. (2004). Customer service secrets. New Delhi: Tata McGraw-Hill Publishing Company Ltd.
Trích dẫn kiểu ChicagoEconomy, Peter. Customer Service Secrets. New Delhi: Tata McGraw-Hill Publishing Company Ltd, 2004.
Deismireacht MLAEconomy, Peter. Customer Service Secrets. New Delhi: Tata McGraw-Hill Publishing Company Ltd, 2004.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.