Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Estados Unidos Geological Survey. (19). Manitou-Frontenac, Keweenaw, and North Cliff geologic sections. U. S. Geological Survey.
Chicago Style (17th ed.) Zitazioa
Estados Unidos Geological Survey. Manitou-Frontenac, Keweenaw, and North Cliff Geologic Sections. U. S. Geological Survey, 19.
MLA (9th ed.) Zitazioa
Estados Unidos Geological Survey. Manitou-Frontenac, Keweenaw, and North Cliff Geologic Sections. U. S. Geological Survey, 19.
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