↑SIMBAD Astronomical Database: Results for NGC 4151 [online]. [cit. 2020-04-30]. Dostupné online. (anglicky)
↑ abcdefNASA/IPAC Extragalactic Database: Results for NGC 4151 [online]. [cit. 2020-04-30]. Dostupné online. (anglicky)
↑ abcFROMMERT, Hartmut. Revised NGC Data for NGC 4151 [online]. SEDS.org [cit. 2020-04-30]. Dostupné online. (anglicky)
↑ abCAPPELLARI, Michele; EMSELLEM, Eric; KRAJNOVIĆ, Davor, et al. The ATLAS3D project - I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria. S. 813–836. Monthly Notices of the Royal Astronomical Society [online]. Květen 2011 [cit. 2020-04-30]. Roč. 413, čís. 2, s. 813–836. Dostupné online. arXiv1012.1551. DOI10.1111/j.1365-2966.2010.18174.x. Bibcode2011MNRAS.413..813C. (anglicky)
↑SELIGMAN, Courtney. Celestial Atlas: NGC 4151 (= PGC 38739), the "Eye of Sauron" Galaxy [online]. [cit. 2020-04-30]. Dostupné online. (anglicky)
↑ abcNGC 4151: An Active Black Hole in the "Eye of Sauron" [online]. NASA, 2011-03-10 [cit. 2020-04-30]. Dostupné online. (anglicky)