Ribot, T. Psychologie de l´attention.
Lua i Stíl Chicago (17ú heag.)Ribot, Th. Psychologie De L´attention.
Lua MLA (8ú heag.)Ribot, Th. Psychologie De L´attention.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)