एपीए उद्धरण

Hester, J. J. (2002). 21st century astronomy. New York: Norton.

शिकागो स्टाइल उद्धरण

Hester, John Jeffrey. 21st Century Astronomy. New York: Norton, 2002.

एमएलए उद्धरण

Hester, John Jeffrey. 21st Century Astronomy. New York: Norton, 2002.