Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Freedman, David, Robert Pisani, i Roger Purves. Statistics. 3rd ed. New York: W.W. Norton, 1998.

Cita MLA (9th ed.)

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