Abigail Adams, John Adams, L. H. Butterfield, Marc Friedlaender, Mary-Jo Kline (1975). “The Book of Abigail and John: Selected Letters of the Adams Family, 1762-1784”, p.173, UPNE
John Adams, Charles Francis Adams (1856). “The Works of John Adams, Second President of the United States: With a Life of the Author, Notes and Illustrations”, p.113