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.217
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.79, UPNE
John Adams (1805). “Discourses on Davila: A series of papers, on political history. Written in the year 1790, and then published in the Gazette of the United States”, p.26
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.85
"Discourses on Davila : A Series of Papers on Political History first published in the Gazette of the United States". Book by John Adams, No. 13, 1805.