Federal Reserve Bank of Dallas. "Regulation Z - Truth in Lending, Circular No. 81-211," District Notices (Federal Reserve Bank of Dallas) (November 3, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541393&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19811103_no81-211.pdf&start_page=1, accessed on September 25, 2017.
Federal Reserve Board Press Release 10-20-81 Requests Comment by 12-7-81 on Proposed Amendment to Definition in Regulation Z, Docket No. R-0368.