O'Dea, V. (1998). Better business by phone: A guide to effective telebusiness management. Macmillan business.
استشهاد بنمط شيكاغوO'Dea, Valerie. Better Business by Phone: A Guide to Effective Telebusiness Management. Macmillan business, 1998.
MLA استشهادO'Dea, Valerie. Better Business by Phone: A Guide to Effective Telebusiness Management. Macmillan business, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.