Não informado. (1785). Bibliography of North American Geology. U.S. Govt. Print. Off.
Lua i Stíl Chicago (17ú heag.)Não informado. Bibliography of North American Geology. Washington: U.S. Govt. Print. Off, 1785.
Lua MLA (8ú heag.)Não informado. Bibliography of North American Geology. U.S. Govt. Print. Off, 1785.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.