APA aipamena

Gupta, S. (1990). Statistical methods/25e (25th ed.). Sultan chand.

Chicago Style aipamena

Gupta, S.P. Statistical Methods/25e. 25th ed. Sultan chand, 1990.

MLA aipamena

Gupta, S.P. Statistical Methods/25e. 25th ed. Sultan chand, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.