Levin, J., & Fox, J. A. (1997). Elementary statistics in social research. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Levin, Jack, agus James Alan Fox. Elementary Statistics in Social Research. Boston: Allyn and Bacon, 1997.
Lua MLA (9ú heag.)Levin, Jack, agus James Alan Fox. Elementary Statistics in Social Research. Allyn and Bacon, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.