United States. Department of Commerce. "Gross Domestic Product for Guam Increases in 2015 : Full Release : Tourism Spending Increases for the Second Year in a Row, BEA 16-50,"
United States Department of Commerce News
(September 21, 2016).
https://fraser.stlouisfed.org/title/6148/item/602370/content/pdf/bea_newsreleases_20160921, accessed on June 1, 2026.