Runyon, R. P., & Harber, A. (1991). Fundamentals of behavioral statistics (7th ed.). McGraw - hill.

Runyon, Richard P., and Audrey Harber. Fundamentals of Behavioral Statistics. 7th ed. New York: McGraw - hill, 1991.

Runyon, Richard P., and Audrey Harber. Fundamentals of Behavioral Statistics. 7th ed. McGraw - hill, 1991.