(9) Clayton, Joseph. Leaders of the People. Studies in democratic history. London, 1910.
(10) Brent, Charles H. Leadership. New York, 1908.
(11) Rothschild, Alonzo. Lincoln: Master of Men. A study in character. Boston, 1906.
(12) Mumford, Eben. The Origins of Leadership. Chicago, 1909.
(13) Ely, Richard T. The World War and Leadership in a Democracy. New York, 1918.
(14) Terman, L. M. "A Preliminary Study of the Psychology and Pedagogy of Leadership," Pedagogical Seminary, XI (1904), 413-51.
(15) Miller, Arthur H. Leadership. A study and discussion of the qualities most to be desired in an officer. New York, 1920.
(16) Gowin, Enoch B. The Executive and His Control of Men. A study in personal efficiency. New York, 1915.
(17) Cooley, Charles H. "Genius, Fame and the Comparison of Races," Annals of the American Academy, IX (1897), 317-58.
(18) Odin, Alfred. Genèse des grands hommes, gens de lettres français modernes. Paris, 1895. [See Ward, Lester F., Applied Sociology, for a statement in English of Odin's study.]