World Register of Marine Species (WoRMS)
Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira da Rocha, R.; Swalla, B.J.; Turon, X. (2026). Ascidiacea World Database. Ascidia alpha Tokioka, 1953. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=249966 on 2026-08-04
Tokioka, T. (1953). Contribution to Japanese ascidian fauna. 5. Ascidians collected near the Marine Biological Laboratory of Hiroshima University in the Inland Sea. Publ. Seto Mar. Biol. Lab. 3(1): 1-25.