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Suporn Satrattanamanee. 1999. Using problem solving activities to motivate students. -:-;
Suporn Satrattanamanee. (1999) Using problem solving activities to motivate students (รายงานผลงานวิจัย). -:-.
Suporn Satrattanamanee. Using problem solving activities to motivate students. -:-, 1999.
Suporn Satrattanamanee. (1999) Using problem solving activities to motivate students (รายงานผลงานวิจัย). -:-.