McClelland, D. C. (1969). Motivating economic achievement. New York: Free Press.
Trích dẫn kiểu ChicagoMcClelland, David C. Motivating Economic Achievement. New York: Free Press, 1969.
Deismireacht MLAMcClelland, David C. Motivating Economic Achievement. New York: Free Press, 1969.
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