Kaplan, S. (2008). Bag the Elephant: How to win & keep big customers. The Free Press.
Lua i Stíl Chicago (17ú heag.)Kaplan, Steve. Bag the Elephant: How to Win & Keep Big Customers. New York: The Free Press, 2008.
Lua MLA (9ú heag.)Kaplan, Steve. Bag the Elephant: How to Win & Keep Big Customers. The Free Press, 2008.
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