Peelen, E. (2022). Customer Relationship Management. Pearson India Education Services Pvt. ltd.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPeelen, Ed. Customer Relationship Management. Noida: Pearson India Education Services Pvt. ltd, 2022.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPeelen, Ed. Customer Relationship Management. Pearson India Education Services Pvt. ltd, 2022.
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