ÖĞRETİR ÖZÇELİK, A. D. And BİLMEZ, B. 2011. Examination on the Abstract Operation Thinking Stage of the Adolescent at the Age Between Eleven and Sixteen”,. ECER 2011 Conference: Urban Education, 13.09.2011 , (Germany).

ÖĞRETİR ÖZÇELİK, A. D., & BİLMEZ, B., (2011). Examination on the Abstract Operation Thinking Stage of the Adolescent at the Age Between Eleven and Sixteen”, . ECER 2011 Conference: Urban Education, 13.09.2011, Germany

ÖĞRETİR ÖZÇELİK, AYŞE, And BESİME BİLMEZ. "Examination on the Abstract Operation Thinking Stage of the Adolescent at the Age Between Eleven and Sixteen”,," ECER 2011 Conference: Urban Education, 13.09.2011, Germany, 2011

ÖĞRETİR ÖZÇELİK, AYŞE D. And BİLMEZ, BESİME. "Examination on the Abstract Operation Thinking Stage of the Adolescent at the Age Between Eleven and Sixteen”,." ECER 2011 Conference: Urban Education, 13.09.2011 , Germany, 2011

ÖĞRETİR ÖZÇELİK, A. D. And BİLMEZ, B. (2011) . "Examination on the Abstract Operation Thinking Stage of the Adolescent at the Age Between Eleven and Sixteen”,." ECER 2011 Conference: Urban Education, 13.09.2011 , Germany.

@conferencepaper{conferencepaper, author={AYŞE DİLEK ÖĞRETİR ÖZÇELİK And author={BESİME BİLMEZ}, title={Examination on the Abstract Operation Thinking Stage of the Adolescent at the Age Between Eleven and Sixteen”,}, congress name={ECER 2011 Conference: Urban Education, 13.09.2011}, city={}, country={Germany}, year={2011}}