Sjoberg, G., & Nett, R. (1968). A methodology for social research. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Sjoberg, Gideon, agus Roger Nett. A Methodology for Social Research. New York: Harper & Row, 1968.
Lua MLA (9ú heag.)Sjoberg, Gideon, agus Roger Nett. A Methodology for Social Research. Harper & Row, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.