APA استشهاد

Gupta,S P. (2007). Elementary statistical methods (17.). sultan chand&Sons.

استشهاد بنمط شيكاغو

Gupta,S P. Elementary Statistical Methods. 17. New Delhi: sultan chand&Sons, 2007.

MLA استشهاد

Gupta,S P. Elementary Statistical Methods. 17. sultan chand&Sons, 2007.