Quinn Patton, M. (1990). Qualitative evaluation and research methods (Segunda edición.). Sage Publications.
Lua i Stíl Chicago (17ú heag.)Quinn Patton, Michael. Qualitative Evaluation and Research Methods. Segunda edición. California: Sage Publications, 1990.
Lua MLA (8ú heag.)Quinn Patton, Michael. Qualitative Evaluation and Research Methods. Segunda edición. Sage Publications, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.