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Lua i Stíl Chicago (17ú heag.)Cook, Roger. Peter Kalkhof: Horizons. London, 2002.
Lua MLA (8ú heag.)Cook, Roger. Peter Kalkhof: Horizons. 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.