Ritchie, A. (1986). The influence of folk music in three works by Béla Bartók: Sonata no.1 for violin and piano, Sonata (1926) for piano, and 'Contrasts' for violin, clarinet and piano.
Lua i Stíl Chicago (17ú heag.)Ritchie, Anthony. The Influence of Folk Music in Three Works by Béla Bartók: Sonata No.1 for Violin and Piano, Sonata (1926) for Piano, and 'Contrasts' for Violin, Clarinet and Piano. 1986.
Lua MLA (8ú heag.)Ritchie, Anthony. The Influence of Folk Music in Three Works by Béla Bartók: Sonata No.1 for Violin and Piano, Sonata (1926) for Piano, and 'Contrasts' for Violin, Clarinet and Piano. 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.