Tài liệu tham khảo WikiPedia: NGC_4608 http://cseligman.com/text/atlas/ngc46.htm#4608 http://nedwww.ipac.caltech.edu/ http://kudzu.astr.ua.edu/devatlas/NGC_4608______B_... //arxiv.org/abs/astro-ph/0301072 //doi.org/10.1086%2F368159 http://server1.wikisky.org/starview?object=NGC+460... http://www.wikisky.org/?object=NGC+4608 http://www.wikisky.org/?object=NGC+4608&img_source... http://www.wikisky.org/?object=NGC+4608&img_source... http://www.wikisky.org/?object=NGC+4608&img_source...
