PUNCH, K. F. O. (2014). Introduction to research methods in education. SAGE.
Lua i Stíl Chicago (17ú heag.)PUNCH, Keith F. Oancea. Introduction to Research Methods in Education. SAGE, 2014.
Lua MLA (9ú heag.)PUNCH, Keith F. Oancea. Introduction to Research Methods in Education. SAGE, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.