Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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