APA (7th ed.) Citation

United States Postal Service. (1983). Mint set of commemorative stamps. Postal Service.

Chicago Style (17th ed.) Citation

United States Postal Service. Mint Set of Commemorative Stamps. [Washington, D.C.]: Postal Service, 1983.

MLA (9th ed.) Citation

United States Postal Service. Mint Set of Commemorative Stamps. Postal Service, 1983.

Warning: These citations may not always be 100% accurate.