Pawson, D. L. (1978). The Echinoderm fauna of Ascencion island. Smithsonian Institution Press.
Lua i Stíl Chicago (17ú heag.)Pawson, David Leo. The Echinoderm Fauna of Ascencion Island. Washington: Smithsonian Institution Press, 1978.
Lua MLA (9ú heag.)Pawson, David Leo. The Echinoderm Fauna of Ascencion Island. Smithsonian Institution Press, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.