(1) Bagehot, Walter. Physics and Politics; or, Thoughts on the Application of the Principles of "Natural Selection" and "Inheritance" to Political Society. New York, 1873.
(2) Tarde, Gabriel. The Laws of Imitation. Translated from the 2d. French ed. by Elsie Clews Parsons. New York, 1903.
(3) Baldwin, James M. Mental Development in the Child and the Race. Methods and processes. 3d. rev. ed. New York, 1906.
(4) ——. Social and Ethical Interpretations in Mental Development. A study in social psychology. 4th ed. New York, 1906.
(5) Royce, Josiah. Outlines of Psychology. An elementary treatise with some practical applications. New York, 1903.
(6) Henderson, Ernest N. A Text-Book in the Principles of Education. Chap. xi, "Imitation." New York, 1910.
(7) Thorndike, E. L. Educational Psychology. Vol. I., The Original Nature of Man. Chap. viii, pp. 108-22. New York, 1913.
(8) Hughes, Henry. Die Mimik des Menschen auf Grund voluntarischer Psychologie. Frankfurt a. M., 1900.
(9) Park, Robert E. Masse und Publikum. Eine methodologische und soziologische Untersuchung. Chap. ii, "Der soziologische Prozess," describes the historical development of the conception of imitation in its relation to sympathy and mimicry in the writings of Hume, Butler, and Dugald Stewart. Bern, 1904.
(10) Smith, Adam. The Theory of Moral Sentiments. To which is added a dissertation on the origin of languages. London, 1892.