APA
Koester E., . (2010). Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. London: CRC.
Chicago
Koester Eric, . 2010. Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. London: CRC.
Harvard
Koester E., . (2010). Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. London: CRC.
MLA
Koester Eric, . Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. London: CRC. 2010.