Wicander, R., & Monroe, J. S. (2009). Essentials of physical geology (5th ed.). Brooks/Cole, Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Wicander, Reed, agus James S. Monroe. Essentials of Physical Geology. 5th ed. Belmont, CA: Brooks/Cole, Cengage Learning, 2009.
Lua MLA (9ú heag.)Wicander, Reed, agus James S. Monroe. Essentials of Physical Geology. 5th ed. Brooks/Cole, Cengage Learning, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.