McBurney, D. H., & White, T. L. (2010). Research methods (8th ed.). Wadsworth.
Lua i Stíl Chicago (17ú heag.)McBurney, Donald H., agus Theresa L. White. Research Methods. 8th ed. Belmont, CA: Wadsworth, 2010.
Lua MLA (8ú heag.)McBurney, Donald H., agus Theresa L. White. Research Methods. 8th ed. Wadsworth, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.