APA (7th ed.) Citation

United States. Postmaster General. (1930). Air mail service to Brazil. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Air Mail Service to Brazil. Washington: U.S. GPO, 1930.

MLA (9th ed.) Citation

United States. Postmaster General. Air Mail Service to Brazil. U.S. GPO, 1930.

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