APA (7th ed.) Zitazioa

Freedman, D., Pisani, R., & Purves, R. (1998). Statistics (3a. ed.). W. W. Norton.

Chicago Style (17th ed.) Zitazioa

Freedman, David, Robert Pisani, eta Roger Purves. Statistics. 3a. ed. Nueva York: W. W. Norton, 1998.

MLA (9th ed.) Zitazioa

Freedman, David, et al. Statistics. 3a. ed. W. W. Norton, 1998.