Cita APA (7a ed.)
Hester, J. J. (2007). 21st century astronomy (2nd ed.). W.W. Norton.
Cita Chicago Style (17a ed.)
Hester, John Jeffrey. 21st Century Astronomy. 2nd ed. New York: W.W. Norton, 2007.
Cita MLA (9a ed.)
Hester, John Jeffrey. 21st Century Astronomy. 2nd ed. W.W. Norton, 2007.
Precaución: Estas citas no son 100% exactas.