APA-referens (7:e uppl.)
Koester, E. (2011). Green entrepreneur handbook: The guide to building and growing a green and clean business. CRC Press LLC.
Chicago-referens (17:e uppl.)
Koester, Eric. Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. Boca Raton, FL: CRC Press LLC, 2011.
MLA-referens (9:e uppl.)
Koester, Eric. Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. CRC Press LLC, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.