United States. Bureau of Economic Analysis. "Total Tourism-Related Sales Grew 6.7 Percent in 2004 : Tourism Activity Up for Ninth Consecutive Quarter, BEA 05-09,"
Bureau of Economic Analysis (BEA) News Releases
(March 14, 2005).
https://fraser.stlouisfed.org/title/6148/item/597969, accessed on March 26, 2025.