APA (7 वां संस्करण) प्रशस्ति पत्र

Sing Avtar. (1996). Law of contract (6.). Eastern Book company.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Sing Avtar. Law of Contract. 6. Lucknow: Eastern Book company, 1996.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Sing Avtar. Law of Contract. 6. Eastern Book company, 1996.