World Register of Marine Species (WoRMS)
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2026). World Foraminifera Database. Elphidium williamsoni Haynes, 1973. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=113291 on 2026-08-24
Haynes, J. R. (1973). Cardigan Bay Recent Foraminifera (Cruises of the R. V. Antur, 1962-1964). Bulletin of the British Museum (Natural History), Zoology. Supplement 4, pp. 1-245.