Garcia, A.M. (Temmuz 1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement Series. Cilt 100 #1. ss. 47-90. Bibcode:1993A&AS..100...47G.
seds.org
spider.seds.org
"SEDS". Revised NGC Data for NGC 507 (İngilizce). 24 Ocak 2019 tarihinde kaynağından arşivlendi.