Heckmann, P. (2013). Adaption and validation of the German version of the basic psychological needs in physical education scale.
Chicago-viite (17. p.)Heckmann, Philip. Adaption and Validation of the German Version of the Basic Psychological Needs in Physical Education Scale. Jyväskylä, 2013.
MLA-viite (9. p.)Heckmann, Philip. Adaption and Validation of the German Version of the Basic Psychological Needs in Physical Education Scale. 2013.
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