APA (7th ed.) Citation

O'Connor, A., & Castlereagh, R. S. (1799). Arthur O'Connor's letter to Lord Castlereagh. [publisher not identified].

Chicago Style (17th ed.) Citation

O'Connor, Arthur, and Robert Stewart Castlereagh. Arthur O'Connor's Letter to Lord Castlereagh. [Ireland?]: [publisher not identified], 1799.

MLA (9th ed.) Citation

O'Connor, Arthur, and Robert Stewart Castlereagh. Arthur O'Connor's Letter to Lord Castlereagh. [publisher not identified], 1799.