Edward Manning Ruttenberg: History of the Indian tribes of Hudson's River. Their origin, manners and customs, tribal and sub-tribal organizations, wars, treaties, etc., etc. J. Munsell, Albanay (New York) 1872, Online, abgerufen am 10. Januar 2014.
Ed Wiken, Francisco Jiménez Nava, Glenn Griffith: North American Terrestrial Ecoregions – Level III. Commission for Environmental Cooperation, Montreal 2011 Online PDF 1.460 kB, abgerufen am 10. Januar 2014.
Nevin M. Fenneman: Physiographic Subdivision of the United States. In: Annals of the Association of American Geographers, Band 3, Nr. 1, 1917, S. 17–22, doi:10.1073/pnas.3.1.17.
ohne Verfasser: Report Reveals Hudson River and Wildlife Have Suffered Decades of Extensive Chemical Contamination, Office of Response and Restoration, National Oceanic and Atmospheric Administration, 16. Januar 2013 Online, abgerufen am 10. Januar 2014.
ohne Verfasser: Lake Mohonk Mountain House, National Historic Landmarks Programm o. J. Online (Memento vom 10. November 2013 im Internet Archive), abgerufen am 10. Januar 2014.