Mason, R. D., Lind, D. A., & Marchal, W. G. (1983). Stadistics an introduction. Harcourt Brace Jovanovich, Publishers.

Mason, Robert D., Douglas A. Lind, and William G. Marchal. Stadistics an Introduction. New York: Harcourt Brace Jovanovich, Publishers, 1983.

Mason, Robert D., et al. Stadistics an Introduction. Harcourt Brace Jovanovich, Publishers, 1983.