Cunningham, W. P. (1999). Environmental encyclopedia (2nd ed.). Gale, Jaico Publishing House.
芝加哥风格引文Cunningham, William P. Environmental Encyclopedia. 2nd ed. Detroit : Mumbai: Gale, Jaico Publishing House, 1999.
MLA引文Cunningham, William P. Environmental Encyclopedia. 2nd ed. Gale, Jaico Publishing House, 1999.
警告：这些引文格式不一定是100％准确.