APA (7th ed.) Citation

Allen, J., & Blake, A. G. E. (1991). Biosphere 2: The human experiment. Viking.

Chicago Style (17th ed.) Citation

Allen, John, and A. G. E. Blake. Biosphere 2: The Human Experiment. New York: Viking, 1991.

MLA (9th ed.) Citation

Allen, John, and A. G. E. Blake. Biosphere 2: The Human Experiment. Viking, 1991.