Plummer, C. C., Carlson, D. H., & Hammersley, L. (2013). Physical geology (14th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Plummer, Charles C., Diane H. Carlson, agus Lisa Hammersley. Physical Geology. 14th ed. New York: McGraw-Hill, 2013.
Lua MLA (9ú heag.)Plummer, Charles C., et al. Physical Geology. 14th ed. McGraw-Hill, 2013.
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