Thomas Jefferson, Nathaniel Francis Cabell, Joseph Carrington Cabell (1856). “Early History of the University of Virginia: As Contained in the Letters of Thomas Jefferson and Joseph C. Cabell, Hitherto Unpublished; with an Appendix, Consisting of Mr. Jefferson's Bill for a Complete System of Education and Other Illustrative Documents; and an Introduction, Comprising a Brief Historical Sketch of the University, and a Biographical Notice of Joseph C. Cabell”, p.389
Thomas Jefferson, Nathaniel Francis Cabell, Joseph Carrington Cabell (1856). “Early History of the University of Virginia: As Contained in the Letters of Thomas Jefferson and Joseph C. Cabell, Hitherto Unpublished; with an Appendix, Consisting of Mr. Jefferson's Bill for a Complete System of Education and Other Illustrative Documents; and an Introduction, Comprising a Brief Historical Sketch of the University, and a Biographical Notice of Joseph C. Cabell”, p.106
Thomas Jefferson (2016). “The Papers of Thomas Jefferson: Retirement Series, Volume 12: 1 September 1817 to 21 April 1818”, p.533, Princeton University Press
C. S. Lewis, Michael Ward (2017). “The Abolition of Man: C.S. Lewis’s Classic Essay on Objective Morality: A Critical Edition by Michael Ward”, p.49, TellerBooks
"What's Wrong With The World". Part Four: Education: Or the Mistake About the Child. Ch. 4: The Truth About Education. Book by Gilbert K. Chesterton, 1910.