Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Estados Unidos Geological Survey & Charles D. Walcott. (1897). Map showing condition and progress of topographic surveys and location of gaging stations for the fiscal year 1896-1897. U. S. Geological Survey.
Chicago Style (17th ed.) Zitazioa
Estados Unidos Geological Survey eta Charles D. Walcott. Map Showing Condition and Progress of Topographic Surveys and Location of Gaging Stations for the Fiscal Year 1896-1897. U. S. Geological Survey, 1897.
MLA (9th ed.) Zitazioa
Estados Unidos Geological Survey eta Charles D. Walcott. Map Showing Condition and Progress of Topographic Surveys and Location of Gaging Stations for the Fiscal Year 1896-1897. U. S. Geological Survey, 1897.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.