Unal, H. 2010. A Visual Proof for the Sum of the First n Triangular Numbers. MATHEMATICAL INTELLIGENCER , vol.32, no.1 , 6-7.

Unal, H., (2010). A Visual Proof for the Sum of the First n Triangular Numbers. MATHEMATICAL INTELLIGENCER , vol.32, no.1, 6-7.

Unal, Hasan. "A Visual Proof for the Sum of the First n Triangular Numbers," MATHEMATICAL INTELLIGENCER , vol.32, no.1, 6-7, 2010

Unal, Hasan. "A Visual Proof for the Sum of the First n Triangular Numbers." MATHEMATICAL INTELLIGENCER , vol.32, no.1, pp.6-7, 2010

Unal, H. (2010) . "A Visual Proof for the Sum of the First n Triangular Numbers." MATHEMATICAL INTELLIGENCER , vol.32, no.1, pp.6-7.

@article{article, author={Hasan ÜNAL}, title={A Visual Proof for the Sum of the First n Triangular Numbers}, journal={MATHEMATICAL INTELLIGENCER}, year=2010, pages={6-7} }