APA aipamena

Ball, A. D., & Buckwell, G. D. (1991). Statistics A Level (2nd ed.). Macmillan.

Chicago Style aipamena

Ball, A D., and G D. Buckwell. Statistics A Level. 2nd ed. London: Macmillan, 1991.

MLA aipamena

Ball, A D., and G D. Buckwell. Statistics A Level. 2nd ed. Macmillan, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.