McBcBurney, D. (2001). Research methods (5th ed.). Thomson Asia.
Lua i Stíl Chicago (17ú heag.)McBcBurney, Donald. Research Methods. 5th ed. Bangalore: Thomson Asia, 2001.
Lua MLA (8ú heag.)McBcBurney, Donald. Research Methods. 5th ed. Thomson Asia, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.