एपीए उद्धरण

(2000). Earth and its resources. New York: McGraw-Hill School division.

शिकागो स्टाइल उद्धरण

Earth and Its Resources. New York: McGraw-Hill School division, 2000.

एमएलए उद्धरण

Earth and Its Resources. New York: McGraw-Hill School division, 2000.