[ 1]. Hugo Münsterberg, American Problems, p. 34.
[ 2]. G.M. Stratton, Experimental Psychology and Its Bearing upon Culture, p. 37.
[ 3]. Ibid., p. 38.
[ 4]. For apparatus for psychological experiment see Stratton, p. 38, p. 171, p. 265.
[ 5]. H.L. Gantt, Work, Wages and Profits, p. 15.
[ 6]. Morris Llewellyn Cooke, Bulletin No. 5, The Carnegie Foundation for the Advancement of Teaching, p. 7.
[ 7]. F.W. Taylor, Shop Management, para. 29. Harper Ed., p. 25.
[ 8]. H.L. Gantt, Paper No. 928, A.S.M.E., para. 6.
[ 9]. F.B. Gilbreth, Cost Reducing System.