Bernard, H. R. (2013). Social research method: Qualitative and quantitative approaches (2nd ed.). SAGE Publications.
Lua i Stíl Chicago (17ú heag.)Bernard, H. Russell. Social Research Method: Qualitative and Quantitative Approaches. 2nd ed. Los Angeles: SAGE Publications, 2013.
Lua MLA (8ú heag.)Bernard, H. Russell. Social Research Method: Qualitative and Quantitative Approaches. 2nd ed. SAGE Publications, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.