Bryman, A. (2012). Social research methods. O.U.P.
Lua i Stíl Chicago (17ú heag.)Bryman, Alan. Social Research Methods. New York: O.U.P, 2012.
Lua MLA (9ú heag.)Bryman, Alan. Social Research Methods. O.U.P, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.