APA (7th ed.) Citation

Palfrey, J. G., & Davis, T. K. John Gorham Palfrey letter to Thomas K. Davis.

Chicago Style (17th ed.) Citation

Palfrey, John Gorham, and Thomas K. Davis. John Gorham Palfrey Letter to Thomas K. Davis.

MLA (8th ed.) Citation

Palfrey, John Gorham, and Thomas K. Davis. John Gorham Palfrey Letter to Thomas K. Davis.

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