„Galaxismag” változatai közötti eltérés

* Hale Bradt: ''Astrophysics Processes'', Cambridge University Press, 2008, {{ISBN |978-0-511-45530-8}}

* ''The Facts On File Dictionary of Astronomy'', Fifth Edition, 2006, {{ISBN |0-8160-5998-5}}

* Jacqueline Mitton: ''Cambridge illustrated dictionary of Astronomy'', Cambridge University Press, 2007, {{ISBN |978-0-521-82364-7}}