Não informado. (1893). Journal of Geology. University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Geology. Chicago, Ill: University of Chicago Press, 1893.
Lua MLA (8ú heag.)Não informado. Journal of Geology. University of Chicago Press, 1893.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.