Federal Reserve Bank of Dallas. "Regulation Z - Truth in Lending, Circular No. 81-118," District Notices (Federal Reserve Bank of Dallas) (June 12, 1981). https://fraser.stlouisfed.org/scribd/?item_id=541300&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19810612_no81-118.pdf&start_page=1, accessed on September 19, 2017.
Revised Regulation Z Technical Amendments, Effective 5-22-81. Proposed Official Staff Interpretation for Regulation Z Commentary (Reference TIL-1).