Niekerk, C. Mahler contra Wagner: The Third Symphony and the Political Legacy of Romanticism / Carl Niekerk. Sound matters : essays on the acoustics of German culture.(2004).
Lua i Stíl Chicago (17ú heag.)Niekerk, Carl. "Mahler Contra Wagner: The Third Symphony and the Political Legacy of Romanticism / Carl Niekerk." Sound Matters : Essays on the Acoustics of German Culture.(2004) .
Lua MLA (8ú heag.)Niekerk, Carl. "Mahler Contra Wagner: The Third Symphony and the Political Legacy of Romanticism / Carl Niekerk." Sound Matters : Essays on the Acoustics of German Culture.(2004), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.