Prentice-Hall, Inc, & Exline, J. D. (2002). Earth science. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Prentice-Hall, Inc, agus Joseph D. Exline. Earth Science. Needham, Mass: Prentice Hall, 2002.
Lua MLA (9ú heag.)Prentice-Hall, Inc, agus Joseph D. Exline. Earth Science. Prentice Hall, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.