APA (7th ed.) Citation

United States. Postmaster General. (1929). Credit for decrease in value of stamped envelopes. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Credit for Decrease in Value of Stamped Envelopes. Washington: U.S. GPO, 1929.

MLA (9th ed.) Citation

United States. Postmaster General. Credit for Decrease in Value of Stamped Envelopes. U.S. GPO, 1929.

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