United States. Department of Commerce. "Outdoor Recreation Satellite Account: Updated Statistics for 2012-2016 : Full Release, BEA 18-48,"
United States Department of Commerce News
(September 20, 2018).
https://fraser.stlouisfed.org/title/6148/item/602656/content/pdf/bea_newsreleases_20180920, accessed on May 31, 2026.