Παραπομπή APA

Freedman, D., & Pisani, R. P. (2006). Statistics (3rd ed.). Viva Books.

Παραπομπή Chicago Style

Freedman, David, και Robert Purves Pisani. Statistics. 3rd ed. New Delhi: Viva Books, 2006.

Παραπομπή MLA

Freedman, David, και Robert Purves Pisani. Statistics. 3rd ed. Viva Books, 2006.