APA (7th ed.) Citation

(1647). Two lettes [sic].: London, May 5. 1647. publisher not identified.

Chicago Style (17th ed.) Citation

Two Lettes [sic].: London, May 5. 1647. [London: publisher not identified, 1647.

MLA (9th ed.) Citation

Two Lettes [sic].: London, May 5. 1647. publisher not identified, 1647.