APA (7th ed.) Citation

Mitchel, J., & Eliot, J. (1750). Mr. Mitchel's letter to his brother. [publisher not identified].

Chicago Style (17th ed.) Citation

Mitchel, Jonathan, and Joseph Eliot. Mr. Mitchel's Letter to His Brother. [Boston?]: [publisher not identified], 1750.

MLA (9th ed.) Citation

Mitchel, Jonathan, and Joseph Eliot. Mr. Mitchel's Letter to His Brother. [publisher not identified], 1750.