Roberts, B. (2002). Biographical research. Open University Press.
Lua i Stíl Chicago (17ú heag.)Roberts, Brian. Biographical Research. Buckingham ; Phildelphia: Open University Press, 2002.
Lua MLA (9ú heag.)Roberts, Brian. Biographical Research. Open University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.