United States. Post Office Department. (1929). Schedule of steamers appointed to convey mails from U.S. to foreign countries, also to Territory of Hawaii and to possessions of U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Post Office Department. Schedule of Steamers Appointed to Convey Mails from U.S. to Foreign Countries, Also to Territory of Hawaii and to Possessions of U.S. [Washington]: GPO, 1929.
MLA (9th ed.) CitationUnited States. Post Office Department. Schedule of Steamers Appointed to Convey Mails from U.S. to Foreign Countries, Also to Territory of Hawaii and to Possessions of U.S. GPO, 1929.
Warning: These citations may not always be 100% accurate.