Koester, E. (2011). Green entrepreneur handbook: The guide to building and growing a green and clean business. CRC Press LLC.
Citace podle Chicago (17th ed.)Koester, Eric. Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. Boca Raton, FL: CRC Press LLC, 2011.
Citace podle MLA (9th ed.)Koester, Eric. Green Entrepreneur Handbook: The Guide to Building and Growing a Green and Clean Business. CRC Press LLC, 2011.
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