एपीए उद्धरण

Hill , M. K. (1997). Understanding environmental pollution. University press.

शिकागो स्टाइल उद्धरण

Hill , Marquita K. Understanding Environmental Pollution. Cambridge: University press, 1997.

एमएलए उद्धरण

Hill , Marquita K. Understanding Environmental Pollution. University press, 1997.