Gaya APA

Harper, S, C. (2005). Extraordinary entrepreneurship : the professional's guide to starting an exceptional enterprise / Stephen C. Harper . New Jersey: John Wiley \r Sons, Inc..

Gaya MLA

Harper, Stephen, C.. "Extraordinary entrepreneurship : the professional's guide to starting an exceptional enterprise / Stephen C. Harper". New Jersey: John Wiley \r Sons, Inc., 2005. Buku.