ÜNAL, H. 2008. Pythagoras and four colors,”. Mathematics Teaching, , vol.206, no.206 , 27-29.

ÜNAL, H., (2008). Pythagoras and four colors,”. Mathematics Teaching, , vol.206, no.206, 27-29.

ÜNAL, Hasan. "Pythagoras and four colors,”," Mathematics Teaching, , vol.206, no.206, 27-29, 2008

ÜNAL, Hasan. "Pythagoras and four colors,”." Mathematics Teaching, , vol.206, no.206, pp.27-29, 2008

ÜNAL, H. (2008) . "Pythagoras and four colors,”." Mathematics Teaching, , vol.206, no.206, pp.27-29.

@article{article, author={Hasan ÜNAL}, title={Pythagoras and four colors,”}, journal={Mathematics Teaching,}, year=2008, pages={27-29} }