APA (7 वां संस्करण) प्रशस्ति पत्र

Wollan, R. &. O. (2013). Selling through someone else. John Wiley.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Wollan, Robert & Others. Selling Through Someone Else. New Jersey: John Wiley, 2013.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Wollan, Robert & Others. Selling Through Someone Else. John Wiley, 2013.