Gupta, S. P. (2017). Statistical Methods (45th rev. ed.). Sultan Chand & Sons.
Chicago Style aipamenaGupta, S. P. Statistical Methods. 45th rev. ed. New Delhi: Sultan Chand & Sons, 2017.
MLA aipamenaGupta, S. P. Statistical Methods. 45th rev. ed. Sultan Chand & Sons, 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.