United States. Postmaster General. (1929). Dispatch of letters and post cards by German airship, "Graf Zeppelin" scheduled to sail Aug. 7, 1929, on round-the-world cruise starting and ending at Lakehurst, N.J. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Postmaster General. Dispatch of Letters and Post Cards by German Airship, "Graf Zeppelin" Scheduled to Sail Aug. 7, 1929, on Round-the-world Cruise Starting and Ending at Lakehurst, N.J. Washington: U.S. GPO, 1929.
MLA (9th ed.) CitationUnited States. Postmaster General. Dispatch of Letters and Post Cards by German Airship, "Graf Zeppelin" Scheduled to Sail Aug. 7, 1929, on Round-the-world Cruise Starting and Ending at Lakehurst, N.J. U.S. GPO, 1929.
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