Avtar singh. (1973). Law of contract. Eastern Book company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAvtar singh. Law of Contract. Lucknow: Eastern Book company, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAvtar singh. Law of Contract. Eastern Book company, 1973.
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