APA (7th ed.) Citation

United States Postal Service. (1989). Postal Source Data System, PSDS: Supervisor's guide. U.S. Postal Service.

Chicago Style (17th ed.) Citation

United States Postal Service. Postal Source Data System, PSDS: Supervisor's Guide. [Washington, DC]: U.S. Postal Service, 1989.

MLA (9th ed.) Citation

United States Postal Service. Postal Source Data System, PSDS: Supervisor's Guide. U.S. Postal Service, 1989.

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