APA (7th ed.) Citation

United States. Postmaster General. (1912). Parcel post regulations, effective from Jan. 1, 1913. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Parcel Post Regulations, Effective from Jan. 1, 1913. Washington: U.S. GPO, 1912.

MLA (9th ed.) Citation

United States. Postmaster General. Parcel Post Regulations, Effective from Jan. 1, 1913. U.S. GPO, 1912.

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