Singh Avtar. (1999). Introduction to law of Contract (3.). Eastern Book company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSingh Avtar. Introduction to Law of Contract. 3. Lucknow: Eastern Book company, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSingh Avtar. Introduction to Law of Contract. 3. Eastern Book company, 1999.
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