Krenek, E. (1940). Studies in Counterpoint: Based on the twelve-tone technique / by Ernst Krenek. Schirmer.
Lua i Stíl Chicago (17ú heag.)Krenek, Ernst. Studies in Counterpoint: Based on the Twelve-tone Technique / by Ernst Krenek. New York: Schirmer, 1940.
Lua MLA (8ú heag.)Krenek, Ernst. Studies in Counterpoint: Based on the Twelve-tone Technique / by Ernst Krenek. Schirmer, 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.