Read, H. H., & Watson, J. (1975). Introduction to geology, volume 2: Earth history, part I. Wiley.
Lua i Stíl Chicago (17ú heag.)Read, Herbert Harold, agus Janet Watson. Introduction to Geology, Volume 2: Earth History, Part I. New York: Wiley, 1975.
Lua MLA (9ú heag.)Read, Herbert Harold, agus Janet Watson. Introduction to Geology, Volume 2: Earth History, Part I. Wiley, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.