O'Dea, V. (1998). Better business by phone: A guide to effective telebusiness management. Macmillan business.
শিকাগো স্টাইলে সাইটেশনO'Dea, Valerie. Better Business by Phone: A Guide to Effective Telebusiness Management. Macmillan business, 1998.
এমএলএ সাইটেশনO'Dea, Valerie. Better Business by Phone: A Guide to Effective Telebusiness Management. Macmillan business, 1998.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.