212850 Nachmias, C., & Nachmias, D. (1981). Research methods in the social science. London : Edward Arnold.
Lua i Stíl Chicago (17ú heag.)212850 Nachmias, Chava, agus David Nachmias. Research Methods in the Social Science. London : Edward Arnold, 1981.
Lua MLA (9ú heag.)212850 Nachmias, Chava, agus David Nachmias. Research Methods in the Social Science. London : Edward Arnold, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.