Kühnemann, Eugen. Herder. München, 1912.
Kühnemann, Dr. Eugen. Herders Persönlichkeit in seiner Weltanschauung. Berlin: Ferd. Dümmlers Verlagsbuchhandlung, 1893.
Leibniz, Gottfried Wilhelm. The Monadology and Other Philosophical Writings. Translated by Robert Latta. Oxford: at the Clarendon Press, 1898.
Morelly. Code de la Nature; ou, Le veritable esprit de ses loix, 1755. Paris: P. Geuthner, 1910.
Morley, John. Rousseau. London: Macmillan & Co., and New York, 1891.
Rand, Benjamin. The Life, Unpublished Letters, and Philosophical Regimen of Anthony, Earl of Shaftesbury. London: Swan Sonnenschein & Co. New York: The Macmillan Co., 1900.
Rousseau, Jean Jacques. Oeuvres Complètes de J. J. Rousseau. Paris: Chez P. Dupont, Libraire-Editeur, 1824.
Rousseau, J. J. Oeuvres Complètes. A Paris: Chez Furne, Libraire-Editeur. 1835.
Schütze, Martin. “Fundamental Ideas in Herder’s Thought.” Modern Philology. Vol. XVIII, June, October, University of Chicago Press, 1920.
Shaftesbury, Anthony Earl of. Characteristicks of Men, Manners, Opinions, Times. Birmingham: Printed by John Baskerville, 1773.