APA (7th ed.) Citation

United States. Postmaster General. (1932). Undeliverable parcels must be indorsed with reason for nondelivery when returned to sender under pledge to pay return postage. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Undeliverable Parcels Must Be Indorsed with Reason for Nondelivery When Returned to Sender Under Pledge to Pay Return Postage. Washington: U.S. GPO, 1932.

MLA (9th ed.) Citation

United States. Postmaster General. Undeliverable Parcels Must Be Indorsed with Reason for Nondelivery When Returned to Sender Under Pledge to Pay Return Postage. U.S. GPO, 1932.