Black, T. R. (2002). Understanding social science research (2nd ed.). Sage.
Lua i Stíl Chicago (17ú heag.)Black, Thomas R. Understanding Social Science Research. 2nd ed. London: Sage, 2002.
Lua MLA (9ú heag.)Black, Thomas R. Understanding Social Science Research. 2nd ed. Sage, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.