KUMAR, R. Research Methodology 4th Edition. Sage India.
Lua i Stíl Chicago (17ú heag.)KUMAR, RANJIT. Research Methodology 4th Edition. Sage India.
Lua MLA (9ú heag.)KUMAR, RANJIT. Research Methodology 4th Edition. Sage India.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.