APA (7th ed.) Citation

United States. Dead Letter Office. (1871). Money-order system of U.S: General principles and instructions to postmasters. GPO.

Chicago Style (17th ed.) Citation

United States. Dead Letter Office. Money-order System of U.S: General Principles and Instructions to Postmasters. [Washington]: GPO, 1871.

MLA (9th ed.) Citation

United States. Dead Letter Office. Money-order System of U.S: General Principles and Instructions to Postmasters. GPO, 1871.

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