एपीए उद्धरण

Agarwal, S. K. (2009). Heavy metal pollution. APH Publishing.

शिकागो स्टाइल उद्धरण

Agarwal, S K. Heavy Metal Pollution. New Delhi: APH Publishing, 2009.

एमएलए उद्धरण

Agarwal, S K. Heavy Metal Pollution. APH Publishing, 2009.