Singh, A. (1983). An introduction to the law of contract (2nd ed.). Eastern Book Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSingh, Avtar. An Introduction to the Law of Contract. 2nd ed. Lucknow: Eastern Book Company, 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSingh, Avtar. An Introduction to the Law of Contract. 2nd ed. Eastern Book Company, 1983.
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