Tohutoro APA (7th ed.)
Coble, C. R. Earth Science (Nueva ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)
Coble, Charles R. Earth Science. Nueva ed. Englewood Cliffs, EUA: Prentice-Hall.
Tohutoro MLA (9th ed.)
Coble, Charles R. Earth Science. Nueva ed. Prentice-Hall.
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