Singh, Y. K. (2006). Environmental science. New Age International (P) Ltd., Publishers.
芝加哥风格引文Singh, Y. K. Environmental Science. New Delhi: New Age International (P) Ltd., Publishers, 2006.
MLA引文Singh, Y. K. Environmental Science. New Age International (P) Ltd., Publishers, 2006.
警告：这些引文格式不一定是100％准确.