APA Citatie

Hester Jeff, Burstein David, Blumenthal George, Smith Bradford, Greeley Ronald, & Voss HowardmG. (2007). 21st Century Astronomy. American: W. W. Norton.

Chicago Style citaat

Hester Jeff, Burstein David, Blumenthal George, Smith Bradford, Greeley Ronald, en Voss HowardmG. 21st Century Astronomy. American: W. W. Norton, 2007.

MLA citatie

Hester Jeff, et al. 21st Century Astronomy. American: W. W. Norton, 2007.