APA (7th ed.) Citation

Swadlin, T. (1647). A Letter of an Independent to his honoured friend in London. [publisher not identified].

Chicago Style (17th ed.) Citation

Swadlin, Thomas. A Letter of an Independent to His Honoured Friend in London. [London?]: [publisher not identified], 1647.

MLA (9th ed.) Citation

Swadlin, Thomas. A Letter of an Independent to His Honoured Friend in London. [publisher not identified], 1647.

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