APA (7 वां संस्करण) प्रशस्ति पत्र

Parsons, T., & Williston, S. (1893). The law of contracts (Eighth edition.). Little, Brown, and Company.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Parsons, Theophilus, और Samuel Williston. The Law of Contracts. Eighth edition. Boston: Little, Brown, and Company, 1893.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Parsons, Theophilus, और Samuel Williston. The Law of Contracts. Eighth edition. Little, Brown, and Company, 1893.