Theodore, M. K., & Theodore, L. (1996). Major environmental issues facing the 21st century. Prentice Hall.
芝加哥风格引文Theodore, Mary K., 与 Louis Theodore. Major Environmental Issues Facing the 21st Century. Upper Saddle River, NJ: Prentice Hall, 1996.
MLA引文Theodore, Mary K., 与 Louis Theodore. Major Environmental Issues Facing the 21st Century. Prentice Hall, 1996.
警告：这些引文格式不一定是100％准确.