APA aipamena

Khanna,DR, & Khanna, D. R. (2013). Environmental technology. Daya&Astral.

Chicago Style aipamena

Khanna,DR, and Dev Raj Khanna. Environmental Technology. Newdelhi: Daya&Astral, 2013.

MLA aipamena

Khanna,DR, and Dev Raj Khanna. Environmental Technology. Daya&Astral, 2013.

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