Fricker, H. Et Al. 2011. Letters. Physics Education , vol.46, no.5 , 628-629.

Fricker, H., Atkin, J., Thomas, G., & ÜNSAL, Y., (2011). Letters. Physics Education , vol.46, no.5, 628-629.

Fricker, Hugh Et Al. "Letters," Physics Education , vol.46, no.5, 628-629, 2011

Fricker, Hugh Et Al. "Letters." Physics Education , vol.46, no.5, pp.628-629, 2011

Fricker, H. Et Al. (2011) . "Letters." Physics Education , vol.46, no.5, pp.628-629.

@article{article, author={Hugh Fricker Et Al. }, title={Letters}, journal={Physics Education}, year=2011, pages={628-629} }