Porter, R. S. (1974). The making of the science of geology in Britain 1660-1815. University of Cambridge.
Lua i Stíl Chicago (17ú heag.)Porter, Roy Sydney. The Making of the Science of Geology in Britain 1660-1815. University of Cambridge, 1974.
Lua MLA (8ú heag.)Porter, Roy Sydney. The Making of the Science of Geology in Britain 1660-1815. University of Cambridge, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.