APA (7th ed.) Citation

United States. Postmaster General. (1924). Ascertainment of cost of handling and transporting several classes of mail matter and conducting special services: Instruction letter P-D-T; parcel post, test of outgoing and incoming mixed parcel post. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Ascertainment of Cost of Handling and Transporting Several Classes of Mail Matter and Conducting Special Services: Instruction Letter P-D-T; Parcel Post, Test of Outgoing and Incoming Mixed Parcel Post. Washington: U.S. GPO, 1924.

MLA (9th ed.) Citation

United States. Postmaster General. Ascertainment of Cost of Handling and Transporting Several Classes of Mail Matter and Conducting Special Services: Instruction Letter P-D-T; Parcel Post, Test of Outgoing and Incoming Mixed Parcel Post. U.S. GPO, 1924.