Sanders, D. H. (1990). Statistics: A fresh approach (4th ed.). McGraw-Hill.
Cita Chicago (17th ed.)Sanders, Donald H. Statistics: A Fresh Approach. 4th ed. New York: McGraw-Hill, 1990.
Cita MLA (9th ed.)Sanders, Donald H. Statistics: A Fresh Approach. 4th ed. McGraw-Hill, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.