एपीए उद्धरण

Campbell, N. A. (2004). Essential biology. San Francisco, CA: Pearson.

शिकागो स्टाइल उद्धरण

Campbell, Neil A. Essential Biology. San Francisco, CA: Pearson, 2004.

एमएलए उद्धरण

Campbell, Neil A. Essential Biology. San Francisco, CA: Pearson, 2004.