World Register of Marine Species (WoRMS)
MolluscaBase eds. (2026). MolluscaBase. Astraea spirata (Dall, 1911). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=575613 on 2026-08-26
Dall, W. H. (1911). Notes on California shells (II). The Nautilus. 24(10): 109-112.