Raina, A. (2004). Speak right for a call centre job: A complete training guide for international telephone interface. Penguin Books India.
শিকাগো স্টাইলে সাইটেশনRaina, Arjun. Speak Right for a Call Centre Job: A Complete Training Guide for International Telephone Interface. New Delhi: Penguin Books India, 2004.
এমএলএ সাইটেশনRaina, Arjun. Speak Right for a Call Centre Job: A Complete Training Guide for International Telephone Interface. Penguin Books India, 2004.
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