Kressel, H. &. W. (2015). If you really want to change the world. Harward Business Review Press.
Lua i Stíl Chicago (17ú heag.)Kressel, Henry & Winarsky. If You Really Want to Change the World. Boston: Harward Business Review Press, 2015.
Lua MLA (9ú heag.)Kressel, Henry & Winarsky. If You Really Want to Change the World. Harward Business Review Press, 2015.
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