Flick, U. (2017). An Introduction to Qualitative Research (5th ed.). SAGE Publications India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Flick, Uwe. An Introduction to Qualitative Research. 5th ed. New Delhi: SAGE Publications India Pvt. Ltd, 2017.
Lua MLA (9ú heag.)Flick, Uwe. An Introduction to Qualitative Research. 5th ed. SAGE Publications India Pvt. Ltd, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.