APA (7 वां संस्करण) प्रशस्ति पत्र

COOK SARAH. (2000). CUSTOMER CARE: HOW TO CREATE AN EFFECTIVE CUSTOMER FOCUS (3RD.). KOGAN PAGE.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

COOK SARAH. CUSTOMER CARE: HOW TO CREATE AN EFFECTIVE CUSTOMER FOCUS. 3RD. LONDON: KOGAN PAGE, 2000.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

COOK SARAH. CUSTOMER CARE: HOW TO CREATE AN EFFECTIVE CUSTOMER FOCUS. 3RD. KOGAN PAGE, 2000.