World Register of Marine Species (WoRMS)
Froese, R. and D. Pauly. Editors. (2026). FishBase. Istigobius spence (Smith, 1947). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=219506 on 2026-08-30
Smith, J. L. B. (1947). New species and new records of fishes from South Africa. Annals and Magazine of Natural History (Series 11). v. 13 (no. 108) (art. 77): 793-821.
Smith, J. L. B. (1959). Gobioid fishes of the families Gobiidae, Periophthalmidae, Trypauchenidae, Taenioididae and Kraemeriidae of the western Indian Ocean. Ichthyological Bulletin, Department of Ichthyology, Rhodes University. 13: 185-225, Pls. 9-13.