APA (7 वां संस्करण) प्रशस्ति पत्र

Nickels, W. G. (1987). Understanding business. Times Mirror/Mosby College Pub..

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Nickels, William G. Understanding Business. St. Louis: Times Mirror/Mosby College Pub., 1987.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Nickels, William G. Understanding Business. Times Mirror/Mosby College Pub., 1987.