APA (7th ed.) Citation

Theodore, M. K., & Theodore, L. (1996). Major environmental issues facing the 21st century. Prentice Hall.

Chicago Style (17th ed.) Citation

Theodore, Mary K., and Louis Theodore. Major Environmental Issues Facing the 21st Century. Upper Saddle, N.J: Prentice Hall, 1996.

MLA (9th ed.) Citation

Theodore, Mary K., and Louis Theodore. Major Environmental Issues Facing the 21st Century. Prentice Hall, 1996.