Khanna,DR, & Khanna, D. R. (2013). Environmental technology. Daya&Astral.
Chicago Edition CitationKhanna,DR, and Dev Raj Khanna. Environmental Technology. Newdelhi: Daya&Astral, 2013.
MLA引文Khanna,DR, and Dev Raj Khanna. Environmental Technology. Daya&Astral, 2013.
警告:这些引文格式不一定是100%准确.