(1972). Factfolder. Factfolder.
Lua i Stíl Chicago (17ú heag.)Factfolder. Kent: Factfolder, 1972.
Lua MLA (8ú heag.)Factfolder. Factfolder, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)