Cita APA (7th ed.)
Schmidt, M. J. (1975). Understanding and using statistics: Basic concepts. D.C. Heath.
Cita Chicago (17th ed.)
Schmidt, Marty J. Understanding and Using Statistics: Basic Concepts. Lexington: D.C. Heath, 1975.
Cita MLA (9th ed.)
Schmidt, Marty J. Understanding and Using Statistics: Basic Concepts. D.C. Heath, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.