Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Ayres H. B., Ashe W. W., & Thompson Gilbert. (1904). Land classification map of part of the Southern appalachian region. U. S. Geological Survey.
Chicago Style (17th ed.) Zitazioa
Ayres H. B., Ashe W. W., eta Thompson Gilbert. Land Classification Map of Part of the Southern Appalachian Region. U. S. Geological Survey, 1904.
MLA (9th ed.) Zitazioa
Ayres H. B., et al. Land Classification Map of Part of the Southern Appalachian Region. U. S. Geological Survey, 1904.
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