APA (7th ed.) Citation

Posthumus. (1770). A letter to the people of Ireland (The second edition.).

Chicago Style (17th ed.) Citation

Posthumus. A Letter to the People of Ireland. The second edition. London, 1770.

MLA (9th ed.) Citation

Posthumus. A Letter to the People of Ireland. The second edition. 1770.

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