APA-čujuhus (7. p.)
Torp, L., & Sage, S. Problems as Possibilities: Problem-Based Learning for K-12 Education. Association for Supervision and Curriculum Development.
Chicago-čujuhus (17. p.)
Torp, Linda, juo Sara Sage. Problems as Possibilities: Problem-Based Learning for K-12 Education. Alexandria, EUA: Association for Supervision and Curriculum Development.
MLA-čujuhus (9. p.)
Torp, Linda, juo Sara Sage. Problems as Possibilities: Problem-Based Learning for K-12 Education. Association for Supervision and Curriculum Development.
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