एपीए उद्धरण

Marshak, S. (2001). Earth: Portrait of a planet. New York: Norton.

शिकागो स्टाइल उद्धरण

Marshak, Stephen. Earth: Portrait of a Planet. New York: Norton, 2001.

एमएलए उद्धरण

Marshak, Stephen. Earth: Portrait of a Planet. New York: Norton, 2001.