APA (7th ed.) Citation

United States Postal Service. (1987). Hazardous materials. United States Postal Service.

Chicago Style (17th ed.) Citation

United States Postal Service. Hazardous Materials. [Washington, DC]: United States Postal Service, 1987.

MLA (8th ed.) Citation

United States Postal Service. Hazardous Materials. United States Postal Service, 1987.

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