Freek Rhebergen & Botting, J. P. (2014). A new Silurian (Llandovery, Telychian) sponge assemblage from Gotland, Sweden. Wiley Blackwell.
Lua i Stíl Chicago (17ú heag.)Freek Rhebergen agus J. P. Botting. A New Silurian (Llandovery, Telychian) Sponge Assemblage from Gotland, Sweden. [Place of publication not identified]: Wiley Blackwell, 2014.
Lua MLA (9ú heag.)Freek Rhebergen agus J. P. Botting. A New Silurian (Llandovery, Telychian) Sponge Assemblage from Gotland, Sweden. Wiley Blackwell, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.