Helin, P. (1988). Psychophysiological activation during performance and competition and the effects of relaxation training and running exercise. University of Kuopio.
Citace podle Chicago (17th ed.)Helin, Pertti. Psychophysiological Activation During Performance and Competition and the Effects of Relaxation Training and Running Exercise. Kuopio: University of Kuopio, 1988.
Citace podle MLA (8th ed.)Helin, Pertti. Psychophysiological Activation During Performance and Competition and the Effects of Relaxation Training and Running Exercise. University of Kuopio, 1988.
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