Παραπομπή APA

Gupta, S. (2000). Statistical methods.- 29th Rev Ed. (29th ed.). Sultan Chand & sons.

Παραπομπή Chicago Style

Gupta, S.P. Statistical Methods.- 29th Rev Ed. 29th ed. New Delhi: Sultan Chand & sons, 2000.

Παραπομπή MLA

Gupta, S.P. Statistical Methods.- 29th Rev Ed. 29th ed. Sultan Chand & sons, 2000.