Thomson, Keith Stewart. "Nineteen. Transcendental Truths". Jefferson's Shadow, New Haven: Yale University Press, 2012, pp. 252-258. https://doi.org/10.12987/9780300187403-022
Thomson, Keith Stewart. "Nineteen. Transcendental Truths" In Jefferson's Shadow, 252-258. New Haven: Yale University Press, 2012. https://doi.org/10.12987/9780300187403-022