एपीए उद्धरण

Jeff Hester. (2007). 21st century astronomy: Stars and Galaxies. New York: Norton.

शिकागो स्टाइल उद्धरण

Jeff Hester. 21st Century Astronomy: Stars and Galaxies. New York: Norton, 2007.

एमएलए उद्धरण

Jeff Hester. 21st Century Astronomy: Stars and Galaxies. New York: Norton, 2007.