RIES, A. (1996). Fokus. Gramedia.
Lua i Stíl Chicago (17ú heag.)RIES, A.L. Fokus. Gramedia, 1996.
Lua MLA (8ú heag.)RIES, A.L. Fokus. Gramedia, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)