एपीए उद्धरण

Hester,Jeff, & Hester, J. J. (2007). 21st century astronomy (2nd ed.). New York: W.W. Norton.

शिकागो स्टाइल उद्धरण

Hester,Jeff, और John Jeffrey Hester. 21st Century Astronomy. 2nd ed. New York: W.W. Norton, 2007.

एमएलए उद्धरण

Hester,Jeff, और John Jeffrey Hester. 21st Century Astronomy. 2nd ed. New York: W.W. Norton, 2007.