O'Connor, A. (1799). Arthur O'Connor's letter to Lord Castlereagh. [s.n.].
Chicago Style (17th ed.) CitationO'Connor, Arthur. Arthur O'Connor's Letter to Lord Castlereagh. [S.l.]: [s.n.], 1799.
MLA (9th ed.) CitationO'Connor, Arthur. Arthur O'Connor's Letter to Lord Castlereagh. [s.n.], 1799.
Warning: These citations may not always be 100% accurate.