Flora, S. R. (2004). The power of reinforcement. State University of New York Press.
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Chicago-čujuhus (17. p.)
Flora, Stephen Ray. The Power of Reinforcement. Albany: State University of New York Press, 2004.
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MLA-čujuhus (9. p.)
Flora, Stephen Ray. The Power of Reinforcement. State University of New York Press, 2004.
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