Bellet. (1972). Essentials of arrhyhias.
Lua i Stíl Chicago (17ú heag.)Bellet. Essentials of Arrhyhias. 1972.
Lua MLA (9ú heag.)Bellet. Essentials of Arrhyhias. 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)