Pieti-Granath, P., & Pirinen, R. (1992). The motivation among foreign language students in summer universities and citizens' evening schools.
Chicago-viite (17. p.)Pieti-Granath, Päivi, ja Riitta Pirinen. The Motivation Among Foreign Language Students in Summer Universities and Citizens' Evening Schools. Jyväskylä, 1992.
MLA-viite (9. p.)Pieti-Granath, Päivi, ja Riitta Pirinen. The Motivation Among Foreign Language Students in Summer Universities and Citizens' Evening Schools. 1992.
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