APA (7 वां संस्करण) प्रशस्ति पत्र
Heckman, L. (2011). How to find business information: A guide for businesspeople, investors, and researchers. Praeger.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Heckman, Lucy. How to Find Business Information: A Guide for Businesspeople, Investors, and Researchers. Santa Barbara, Calif.: Praeger, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Heckman, Lucy. How to Find Business Information: A Guide for Businesspeople, Investors, and Researchers. Praeger, 2011.
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