Henn, M. &. W.. (2006). Critical Introduction To Social Research (2nd ed.). Sage Publisher.
Lua i Stíl Chicago (17ú heag.)Henn, Matt & Weinstein. Critical Introduction To Social Research. 2nd ed. Delhi: Sage Publisher, 2006.
Lua MLA (9ú heag.)Henn, Matt & Weinstein. Critical Introduction To Social Research. 2nd ed. Sage Publisher, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.