- ^ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. The Two Micron All Sky Survey (2MASS). The Astronomical Journal. 1 February 2006, 131: 1163–1183 [2022-06-24]. ISSN 0004-6256. doi:10.1086/498708. (原始內容存檔於2022-04-02).
- ^ 2.0 2.1 2.2 2.3 2.4 2.5 Results for NGC 252. NASA/IPAC Extragalactic Database. [12 February 2017]. (原始內容存檔於2019-03-27).
- ^ NGC 3610. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 4.0 4.1 A young elliptical. Hubble Space Telescope. [16 December 2016]. (原始內容存檔於2020-08-06).
- ^ NGC 3610 (= PGC 34566). cseligman. [12 February 2017]. (原始內容存檔於2019-02-03).