Solomon Robert. (2016). The Art of Client Service (3rd.). Wiley India Pvt Ltd.
Chicago-čujuhus (17. p.)Solomon Robert. The Art of Client Service. 3rd. New Delhi: Wiley India Pvt Ltd, 2016.
MLA-čujuhus (9. p.)Solomon Robert. The Art of Client Service. 3rd. Wiley India Pvt Ltd, 2016.
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