World Register of Marine Species (WoRMS)
Garic, R.; van Soest, R.W.M. (2026). World List of Thaliacea. Apsteinia Metcalf, 1918. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=722828 on 2026-08-28
Metcalf, M.M. 1918. The Salpidae; a taxonomic study. Bulletin United States National Museum (2) 100 (2): 5-193.