United States. Department of Commerce and United States. Bureau of Economic Analysis. "Preliminary and Revised Second Quarter 1965 and Historical Data," The National Income and Product Account (1965-08-01). https://fraser.stlouisfed.org/scribd/?item_id=57013&filepath=/files/docs/releases/nipa/1960s/nipa_scb081965.pdf, accessed on December 16, 2017.
Preliminary Data for Q2.1965, Revised Q2.1962 to Q2.1965, and Historical Revisions back to 1961