Citazione Stile APA (7a Edizione)

Welkowitz, J., & Ewen, R. B. ,. (1971). Introductory statistics for the behavioral sciences. Academic Press.

Citazione stile Chigago Style (17a edizione)

Welkowitz, Joan, e Robert B. ,Cohen Ewen. Introductory Statistics for the Behavioral Sciences. New York: Academic Press, 1971.

Citatione MLA (9a ed.)

Welkowitz, Joan, e Robert B. ,Cohen Ewen. Introductory Statistics for the Behavioral Sciences. Academic Press, 1971.