APA (7th ed.) Citation

United States. Postmaster General. (1932). Printed-envelope requisitions. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Printed-envelope Requisitions. Washington: U.S. GPO, 1932.

MLA (9th ed.) Citation

United States. Postmaster General. Printed-envelope Requisitions. U.S. GPO, 1932.

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