APA-ийн эшлэл(7 дахь хэвлэлт)
Torp, L., & Sage, S. (2002). Problems as possibilities: Problem-based learning for K-16 education. Association for Supervision & Curriculum Development.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Torp, Linda, ба Sara Sage. Problems as Possibilities: Problem-based Learning for K-16 Education. Alexandria, Va.: Association for Supervision & Curriculum Development, 2002.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Torp, Linda, ба Sara Sage. Problems as Possibilities: Problem-based Learning for K-16 Education. Association for Supervision & Curriculum Development, 2002.
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