Widok standardowy
Widok MARC
Stany Zjednoczone. National Park Service.(Hasło korporatywne)
Forma odrzucona:
- United States. National Park Service.
- United States Department of the Interio. National Park Service.
- US Department of the Interio. National Park Service.
- National Park Service.
- National Parks Service.
- Stany Zjednoczone. Department of the Interior. National Park Service.
- United States. Department of the Interior. National Park Service.
- National Park Service US Department of the Interio.
- Stany Zjednoczone. Harpers Ferry Center. National Park Service.
- United States. Harpers Ferry Center. National Park Service.
- Harpers Ferry Center. National Park Service.
Kp. The National Parks Portfolio / by Robert Sterling Yard. - Washington, 1931.
Deutsche Digitale Bibliothek (United States / National Park Service)
http://www.nps.gov/ (National Park Service US Department of the Interio)
Kp. "Oh ranger!" : a book about the National Parks / by Horace M. Albright and Frank J. Taylor. - New York, 1936.
pl.wikipedia, 30.XI.2009 (Agencja federalna Stanów Zjednoczonych, której zadaniem jest dbanie o zasoby naturalne i historyczne kraju)
The national parks : shaping the system / produced by Harpers Ferry Center National Park Service. - Washington, [2005].
National Park Service, 7.12.22 https://www.nps.gov/subjects/hfc/index.htm