David C. McClelland, John W. Atkinson, Russell A. Clark, and Edgar L. Lowell. The Achievement Motive. New York: Appleton-Century-Crofts 1953; John W. Atkinson. An Introduction to Motivation. Princeton, NJ: Van Nostrand, 1964; Murray R. Barrick, Greg L. Steward, and Mike Piotrowski. Personality and Job Performance: Test of the Mediating Effects of Motivation Among Sales Representatives. Journal of Applied Psychology 87 (февраль 2002). С. 43.