APA (7th ed.) Citation

United States. Postmaster General. (1923). Ascertainment of cost of handling and transporting several classes of mail matter and conducting special services: Instruction letter R-dx; time reports by items and tests of mixed items in specially designated terminal R.P.O.'s. 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 R-dx; Time Reports by Items and Tests of Mixed Items in Specially Designated Terminal R.P.O.'s. Washington: U.S. GPO, 1923.

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 R-dx; Time Reports by Items and Tests of Mixed Items in Specially Designated Terminal R.P.O.'s. U.S. GPO, 1923.