एपीए उद्धरण

Bernard J Nebel. (1998). Environmental science: The way the world works. Upper Saddle River, New Jersey: Prentice-Hall.

शिकागो स्टाइल उद्धरण

Bernard J Nebel. Environmental Science: The Way the World Works. Upper Saddle River, New Jersey: Prentice-Hall, 1998.

एमएलए उद्धरण

Bernard J Nebel. Environmental Science: The Way the World Works. Upper Saddle River, New Jersey: Prentice-Hall, 1998.