Walls, J. G. (1982). Encyclopedia of marine invertebrates. IFH Publications.
Lua i Stíl Chicago (17ú heag.)Walls, Jerry G. Encyclopedia of Marine Invertebrates. Neptune City, New Jersey: IFH Publications, 1982.
Lua MLA (9ú heag.)Walls, Jerry G. Encyclopedia of Marine Invertebrates. IFH Publications, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.