APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

O'Connor, Arthur. Arthur O'Connor's Letter to Lord Castlereagh. [Dublin?]: [publisher not identified], 1799.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.