1986 Presidential mint set.
APA Citation
United States Postal Service. (1986). 1986 Presidential mint set. [Washington, D.C.?]: U.S. Postal Service.
MLA Citation
United States Postal Service. 1986 Presidential Mint Set. [Washington, D.C.?]: U.S. Postal Service, 1986.
Warning: These citations may not always be complete (especially for serials).