Gupta (SL) & Ratna (VV), . (2005). Marketing of Services. : Wisdom Pub., Delhi.
Gupta (SL) & Ratna (VV), . 2005. Marketing of Services. : Wisdom Pub., Delhi.
Gupta (SL) & Ratna (VV), . Marketing of Services. : Wisdom Pub., Delhi. 2005.
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