^ 1.01.11.2MWC 922, SIMBAD, Centre de données astronomiques de Strasbourg, 2016-05-12 [2020-07-27], (原始内容于2020-08-16)
^ 2.02.12.22.3Peter Tuthill. The Red Square. [2011-05-02]. (原始内容于2021-03-30).
^Saleh, Anna. Dazzling red square found in space. ABC Science Online. 2007-04-13 [2007-04-16]. (原始内容于2020-08-03).
參考資料
Dayton, Leigh. It's hip to be square in a nebula. 2007-04-13 [2007-04-13]. (原始内容于2007-08-27).|journal=被忽略 (帮助)
Saleh, Anna. Dazzling red square found in space. ABC Science Online. 2007-04-13 [2011-05-02]. (原始内容于2021-03-09).
外部連結
Than, Ker. Near-Perfect Symmetry Revealed in Red Cosmic Square. Space.com. 12 April 2007 [2011-03-18]. (原始内容于2010-08-08).
Astronomers Obtain Highly Detailed Image of the 'Red Square'. Phys.Org. 13 April 2007 [2011-03-18]. (原始内容于2011-06-06).
Tuthill, Peter G.; Lloyd, J. P. A Symmetric Bipolar Nebula Around MWC 922. Science. 13 April 2007, 316 (5822): 247. Bibcode:2007Sci...316..247T. PMID 17431173. doi:10.1126/science.1135950.
NASA Astronomy Picture of the Day: MWC 922: The Red Square Nebula (16 April 2007)
NASA Astronomy Picture of the Day: MWC 922: The Red Square Nebula (23 March 2011)