Middleton, N., & Thomas, D. (1997). World atlas of desertification (2nd ed.). Arnold.
芝加哥风格引文Middleton, Nick, 与 David Thomas. World Atlas of Desertification. 2nd ed. London: Arnold, 1997.
MLA引文Middleton, Nick, 与 David Thomas. World Atlas of Desertification. 2nd ed. Arnold, 1997.
警告：这些引文格式不一定是100％准确.