Boyd, J. P., & Gawalt, G. W. (1999). The Declaration of Independence: The evolution of the text (Rev. ed.). International Center for Jefferson Studies at Monticello in association with the Library of Congress.

Boyd, Julian P., and Gerard W. Gawalt. The Declaration of Independence: The Evolution of the Text. Rev. ed. Charlottesville: International Center for Jefferson Studies at Monticello in association with the Library of Congress, 1999.

Boyd, Julian P., and Gerard W. Gawalt. The Declaration of Independence: The Evolution of the Text. Rev. ed. International Center for Jefferson Studies at Monticello in association with the Library of Congress, 1999.