United States. Bureau of Economic Analysis. "Travel and Tourism Spending Stepped Up in the Second Quarter : Full Release : Travel and Tourism Satellite Account Second Quarter 2017, BEA 17-46,"
Bureau of Economic Analysis (BEA) News Releases
(September 13, 2017).
https://fraser.stlouisfed.org/title/6148/item/602517/content/pdf/bea_newsreleases_20170913, accessed on June 23, 2025.