Cita APA (7th ed.)

Anderson, S. H., Beiswenger, R. E., & Purdam, P. W. (1993). Environmental science (4th ed.). Macmillan.

Cita Chicago (17th ed.)

Anderson, Stanley H., Ronald E. Beiswenger, i P Walton Purdam. Environmental Science. 4th ed. New York: Macmillan, 1993.

Cita MLA (9th ed.)

Anderson, Stanley H., et al. Environmental Science. 4th ed. Macmillan, 1993.