ÇELİK, D. 2007. Preservice Secondary School Teachers’ Levels of Use Symbols and Algebraic Thinking. XIII World Congress Comparative Education Societies , (Saraybosna, Bosnia And Herzegovina).

ÇELİK, D., (2007). Preservice Secondary School Teachers’ Levels of Use Symbols and Algebraic Thinking . XIII World Congress Comparative Education Societies, Saraybosna, Bosnia And Herzegovina

ÇELİK, DERYA. "Preservice Secondary School Teachers’ Levels of Use Symbols and Algebraic Thinking," XIII World Congress Comparative Education Societies, Saraybosna, Bosnia And Herzegovina, 2007

ÇELİK, DERYA. "Preservice Secondary School Teachers’ Levels of Use Symbols and Algebraic Thinking." XIII World Congress Comparative Education Societies , Saraybosna, Bosnia And Herzegovina, 2007

ÇELİK, D. (2007) . "Preservice Secondary School Teachers’ Levels of Use Symbols and Algebraic Thinking." XIII World Congress Comparative Education Societies , Saraybosna, Bosnia And Herzegovina.

@conferencepaper{conferencepaper, author={DERYA ÇELİK}, title={Preservice Secondary School Teachers’ Levels of Use Symbols and Algebraic Thinking}, congress name={XIII World Congress Comparative Education Societies}, city={Saraybosna}, country={Bosnia And Herzegovina}, year={2007}}