Cita APA (7th ed.)
Downie, N. M., & Heath, R. W. (1965). Basic statistical methods (2nd ed.). Harper & Row.
Cita Chicago (17th ed.)
Downie, N. M., i R. W. Heath. Basic Statistical Methods. 2nd ed. New York: Harper & Row, 1965.
Cita MLA (9th ed.)
Downie, N. M., i R. W. Heath. Basic Statistical Methods. 2nd ed. Harper & Row, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.