APA (7 वां संस्करण) प्रशस्ति पत्र

Sommer, R. (1997). A practical guide to behavioral research: Tools and techniques (4th ed.). OUP.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Sommer, Robert. A Practical Guide to Behavioral Research: Tools and Techniques. 4th ed. New York: OUP, 1997.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Sommer, Robert. A Practical Guide to Behavioral Research: Tools and Techniques. 4th ed. OUP, 1997.