Friedl Alfred E. (1997). Teaching science to children: An inqury approach (4th edition.). McGraw Hill.
Chicago Style (17th ed.) CitationFriedl Alfred E. Teaching Science to Children: An Inqury Approach. 4th edition. USA: McGraw Hill, 1997.
Trích dẫn MLAFriedl Alfred E. Teaching Science to Children: An Inqury Approach. 4th edition. McGraw Hill, 1997.
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