Wright, R. L. D. (1976). Understanding statistics: An informal introduction for the behavioral sciences. Harcourt Brace Jovanovich.
Lua i Stíl Chicago (17ú heag.)Wright, Robert Leslie Douglas. Understanding Statistics: An Informal Introduction for the Behavioral Sciences. New York: Harcourt Brace Jovanovich, 1976.
Lua MLA (9ú heag.)Wright, Robert Leslie Douglas. Understanding Statistics: An Informal Introduction for the Behavioral Sciences. Harcourt Brace Jovanovich, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.