Citazione Stile APA (7a Edizione)

Kaufman, D. G., & Franz, C. M. (1993). Biosphere 2000: Protecting our global environment. HarperCollins College Publishers.

Citazione stile Chigago Style (17a edizione)

Kaufman, Donald G., e Cecilia M. Franz. Biosphere 2000: Protecting Our Global Environment. New York, NY: HarperCollins College Publishers, 1993.

Citatione MLA (9a ed.)

Kaufman, Donald G., e Cecilia M. Franz. Biosphere 2000: Protecting Our Global Environment. HarperCollins College Publishers, 1993.