Citazione APA

Freedman, D., Pisani, R., & Purves, R. (1978). Instructor's mannual for statistics. W. W. Norton & Company.

Stile di citazione Chicago

Freedman, David, Robert Pisani, e Roger Purves. Instructor's Mannual for Statistics. New York: W. W. Norton & Company, 1978.

Citazione MLA

Freedman, David, et al. Instructor's Mannual for Statistics. W. W. Norton & Company, 1978.