Singh, A. (2003). Encyclopedia of teaching of environmental sciences, Vol. 2. Anmol.
芝加哥风格引文Singh, A.K. Encyclopedia of Teaching of Environmental Sciences, Vol. 2. NewDelhi: Anmol, 2003.
MLA引文Singh, A.K. Encyclopedia of Teaching of Environmental Sciences, Vol. 2. Anmol, 2003.
警告：这些引文格式不一定是100％准确.