Watts, F. (1921). An introduction to the psychological problems of industry. Allen & Unwin.
Chicago-viite (17. p.)Watts, Frank. An Introduction to the Psychological Problems of Industry. London: Allen & Unwin, 1921.
MLA-viite (8. p.)Watts, Frank. An Introduction to the Psychological Problems of Industry. Allen & Unwin, 1921.
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