APA (7th ed.) Zitazioa
Riddle, J. (2001). Entrepreneur magazine's consulting business. Entrepreneur Press.
Chicago Style (17th ed.) Zitazioa
Riddle, John. Entrepreneur Magazine's Consulting Business. Irvine, CA: Entrepreneur Press, 2001.
MLA (9th ed.) Zitazioa
Riddle, John. Entrepreneur Magazine's Consulting Business. Entrepreneur Press, 2001.
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