Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Estados Unidos Geological Survey. (19). Geologic map of copper range from Gratiot to La Salle, Michigan. U. S. Geological Survey.
Chicago Style (17th ed.) Zitazioa
Estados Unidos Geological Survey. Geologic Map of Copper Range from Gratiot to La Salle, Michigan. U. S. Geological Survey, 19.
MLA (9th ed.) Zitazioa
Estados Unidos Geological Survey. Geologic Map of Copper Range from Gratiot to La Salle, Michigan. U. S. Geological Survey, 19.
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