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"Treaty of Tripoli". Treaty of Peace and Friendship between the United States of America and the Bey and Subjects of Tripoli of Barbary signed by President John Adams (Article 11), www.huffingtonpost.com. June 10, 1797.
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.235
John Adams, Abigail Adams, Thomas Jefferson (1971). “The Adams-Jefferson letters: the complete correspondence between Thomas Jefferson and Abigail and John Adams”, Touchstone