Ott, L., & Mendenhall, W. (1985). Understanding statistics (4th ed.). Duxbury Pr..
Cita Chicago (17th ed.)Ott, Lyman, i William Mendenhall. Understanding Statistics. 4th ed. Boston, Mass.: Duxbury Pr., 1985.
Cita MLA (9th ed.)Ott, Lyman, i William Mendenhall. Understanding Statistics. 4th ed. Duxbury Pr., 1985.
Atenció: Aquestes cites poden no estar 100% correctes.