Mason, R. D., Lind, D. A., & Marchal, W. G. (1983). Stadistics an introduction. Harcourt Brace Jovanovich, Publishers.
Cita Chicago (17th ed.)Mason, Robert D., Douglas A. Lind, i William G. Marchal. Stadistics an Introduction. New York: Harcourt Brace Jovanovich, Publishers, 1983.
Cita MLA (9th ed.)Mason, Robert D., et al. Stadistics an Introduction. Harcourt Brace Jovanovich, Publishers, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.