APA (7th ed.) Citation

United States. Post Office Department. (1913). Parcel post information. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Parcel Post Information. [Washington]: GPO, 1913.

MLA (9th ed.) Citation

United States. Post Office Department. Parcel Post Information. GPO, 1913.

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