Crabtree, J. (1982). Basic principles of effective teaching. Standard Pub..
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Chicago-čujuhus (17. p.)
Crabtree, June. Basic Principles of Effective Teaching. Cincinnati, Ohio: Standard Pub., 1982.
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MLA-čujuhus (9. p.)
Crabtree, June. Basic Principles of Effective Teaching. Standard Pub., 1982.
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