Berry, R. (1994). The research project: How to write it (3rd.). Roultdge.
Lua i Stíl Chicago (17ú heag.)Berry, Ralph. The Research Project: How to Write It. 3rd. London: Roultdge, 1994.
Lua MLA (9ú heag.)Berry, Ralph. The Research Project: How to Write It. 3rd. Roultdge, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.