ÜNAL, H. 2009. Proof without words: An identity of sin squared. Mathematics and Computer Education , vol.43, no.2 .

ÜNAL, H., (2009). Proof without words: An identity of sin squared. Mathematics and Computer Education , vol.43, no.2.

ÜNAL, Hasan. "Proof without words: An identity of sin squared," Mathematics and Computer Education , vol.43, no.2, 2009

ÜNAL, Hasan. "Proof without words: An identity of sin squared." Mathematics and Computer Education , vol.43, no.2, 2009

ÜNAL, H. (2009) . "Proof without words: An identity of sin squared." Mathematics and Computer Education , vol.43, no.2.

@article{article, author={Hasan ÜNAL}, title={Proof without words: An identity of sin squared}, journal={Mathematics and Computer Education}, year=2009}