APA (7th ed.) Citation

United States. Postmaster General. (1928). Use of Government stamped envelopes of 1-cent denomination for bulk mailings of 3rd-class matter. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Use of Government Stamped Envelopes of 1-cent Denomination for Bulk Mailings of 3rd-class Matter. Washington: U.S. GPO, 1928.

MLA (9th ed.) Citation

United States. Postmaster General. Use of Government Stamped Envelopes of 1-cent Denomination for Bulk Mailings of 3rd-class Matter. U.S. GPO, 1928.

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