ÜNAL, H. 2009. Proof without Words: Sum of an Infinite Series. The College Mathematics Journal , vol.40, no.1 .

ÜNAL, H., (2009). Proof without Words: Sum of an Infinite Series. The College Mathematics Journal , vol.40, no.1.

ÜNAL, Hasan. "Proof without Words: Sum of an Infinite Series," The College Mathematics Journal , vol.40, no.1, 2009

ÜNAL, Hasan. "Proof without Words: Sum of an Infinite Series." The College Mathematics Journal , vol.40, no.1, 2009

ÜNAL, H. (2009) . "Proof without Words: Sum of an Infinite Series." The College Mathematics Journal , vol.40, no.1.

@article{article, author={Hasan ÜNAL}, title={Proof without Words: Sum of an Infinite Series}, journal={The College Mathematics Journal}, year=2009}