Malec, M. A. (1993). Essential statistics for social research (2nd ed., rev. and updated.). Westview Press.
Lua i Stíl Chicago (17ú heag.)Malec, Michael A. Essential Statistics for Social Research. 2nd ed., rev. and updated. Boulder, Colo.: Westview Press, 1993.
Lua MLA (8ú heag.)Malec, Michael A. Essential Statistics for Social Research. 2nd ed., rev. and updated. Westview Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.