Παραπομπή APA

Gupta, S. (1981). Statistical methods/16e (16th ed.). Sulthan Chand & Sons.

Παραπομπή Chicago Style

Gupta, S.P. Statistical Methods/16e. 16th ed. New Delhi: Sulthan Chand & Sons, 1981.

Παραπομπή MLA

Gupta, S.P. Statistical Methods/16e. 16th ed. Sulthan Chand & Sons, 1981.