LAPP, R. E. Matter. New York.
Lua i Stíl Chicago (17ú heag.)LAPP, RALPH E. Matter. New York.
Lua MLA (8ú heag.)LAPP, RALPH E. Matter. New York.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)