APA (7 वां संस्करण) प्रशस्ति पत्र

Gonda,Cyrus M. Where is my ketchup: How to give & receive exceotional customer service. Embassy Book.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Gonda,Cyrus M. Where Is My Ketchup: How to Give & Receive Exceotional Customer Service. Mumbai: Embassy Book.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Gonda,Cyrus M. Where Is My Ketchup: How to Give & Receive Exceotional Customer Service. Embassy Book.

चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.