Παραπομπή APA

Gupta, S. P. (2000). Statistical methods (28.). Sulthan Chand and Sons.

Παραπομπή Chicago Style

Gupta, S P. Statistical Methods. 28. New Delhi: Sulthan Chand and Sons, 2000.

Παραπομπή MLA

Gupta, S P. Statistical Methods. 28. Sulthan Chand and Sons, 2000.