Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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