Abbott, R. (1989). Compendium of landshellsa color guide to more than 2,000 of the worlds terrestrial shellsR.Tucker Abbott. American Malacologists.
Lua i Stíl Chicago (17ú heag.)Abbott, R.Tucker. Compendium of Landshellsa Color Guide to More than 2,000 of the Worlds Terrestrial ShellsR.Tucker Abbott. American Malacologists, 1989.
Lua MLA (8ú heag.)Abbott, R.Tucker. Compendium of Landshellsa Color Guide to More than 2,000 of the Worlds Terrestrial ShellsR.Tucker Abbott. American Malacologists, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.