एपीए उद्धरण

Zeilik, M. (1979). Astronomy: The evolving universe (2.).

शिकागो स्टाइल उद्धरण

Zeilik, Michael. Astronomy: The Evolving Universe. 2. Harper & Brother Publishers, New York, 1979.

एमएलए उद्धरण

Zeilik, Michael. Astronomy: The Evolving Universe. 2. 1979.