Lua APA (7ú heag.)
Creswell, J. W. (1994). Research design: Qualitative and Quantitative Approaches. Sage.
Lua i Stíl Chicago (17ú heag.)
Creswell, John W. Research Design: Qualitative and Quantitative Approaches. London: Sage, 1994.
Lua MLA (9ú heag.)
Creswell, John W. Research Design: Qualitative and Quantitative Approaches. Sage, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.