Hopfenbeck, W. (1993). The green management revolution: Lessons in environmental excellence. Prentice Hall.
Chicago-viite (17. p.)Hopfenbeck, Waldemar. The Green Management Revolution: Lessons in Environmental Excellence. New York: Prentice Hall, 1993.
MLA-viite (9. p.)Hopfenbeck, Waldemar. The Green Management Revolution: Lessons in Environmental Excellence. Prentice Hall, 1993.
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