Fabricius, F. H. (1977). Origin of marine oöids and grapestones. Schweizerbart.
Lua i Stíl Chicago (17ú heag.)Fabricius, Frank H. Origin of Marine Oöids and Grapestones. Stuttgart: Schweizerbart, 1977.
Lua MLA (9ú heag.)Fabricius, Frank H. Origin of Marine Oöids and Grapestones. Schweizerbart, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.