United States. Department of State. (1920). Revision of trade information sheets to accompany commercial letters. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of State. Revision of Trade Information Sheets to Accompany Commercial Letters. Washington: U.S. GPO, 1920.
MLA (9th ed.) CitationUnited States. Department of State. Revision of Trade Information Sheets to Accompany Commercial Letters. U.S. GPO, 1920.
Warning: These citations may not always be 100% accurate.