एपीए उद्धरण

Maxwell, N. I. (2011). Understanding Environmental Health study guide.

शिकागो स्टाइल उद्धरण

Maxwell, Nancy Irwin. Understanding Environmental Health Study Guide. London, Jones and Bartlett Publishers, 2011.

एमएलए उद्धरण

Maxwell, Nancy Irwin. Understanding Environmental Health Study Guide. 2011.