Cita APA

Freedman, D., Pisani, R., & Purves, R. (2010). Statistics/4th ed. Viva Books.

Chicago Edition Citation

Freedman, David, Robert Pisani, i Roger Purves. Statistics/4th Ed. New Delhi: Viva Books, 2010.

Cita MLA

Freedman, David, et al. Statistics/4th Ed. Viva Books, 2010.