Kaufman, D. G., & Franz, C. M. (1993). Biosphere 2000: Protecting our global environment. HarperCollins College Publishers.
Chicago Style aipamenaKaufman, Donald G., and Cecilia M. Franz. Biosphere 2000: Protecting Our Global Environment. New York: HarperCollins College Publishers, 1993.
MLA aipamenaKaufman, Donald G., and Cecilia M. Franz. Biosphere 2000: Protecting Our Global Environment. HarperCollins College Publishers, 1993.
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