Celik, M. And Tekbiyik, A. 2016. The Influence of Activities Based on GEMS with the Theme of Earth Crust on the Fourth Grade Students' Conceptual Understanding and Scientific Process Skills. PEGEM EGITIM VE OGRETIM DERGISI , vol.6, no.3 , 303-332.

Celik, M., & Tekbiyik, A., (2016). The Influence of Activities Based on GEMS with the Theme of Earth Crust on the Fourth Grade Students' Conceptual Understanding and Scientific Process Skills. PEGEM EGITIM VE OGRETIM DERGISI , vol.6, no.3, 303-332.

Celik, Mustafa, And AHMET TEKBIYIK. "The Influence of Activities Based on GEMS with the Theme of Earth Crust on the Fourth Grade Students' Conceptual Understanding and Scientific Process Skills," PEGEM EGITIM VE OGRETIM DERGISI , vol.6, no.3, 303-332, 2016

Celik, Mustafa And Tekbiyik, AHMET. "The Influence of Activities Based on GEMS with the Theme of Earth Crust on the Fourth Grade Students' Conceptual Understanding and Scientific Process Skills." PEGEM EGITIM VE OGRETIM DERGISI , vol.6, no.3, pp.303-332, 2016

Celik, M. And Tekbiyik, A. (2016) . "The Influence of Activities Based on GEMS with the Theme of Earth Crust on the Fourth Grade Students' Conceptual Understanding and Scientific Process Skills." PEGEM EGITIM VE OGRETIM DERGISI , vol.6, no.3, pp.303-332.

@article{article, author={Mustafa Celik And author={AHMET TEKBIYIK}, title={The Influence of Activities Based on GEMS with the Theme of Earth Crust on the Fourth Grade Students' Conceptual Understanding and Scientific Process Skills}, journal={PEGEM EGITIM VE OGRETIM DERGISI}, year=2016, pages={303-332} }