Beekman, J., & Vries, J. d. Criticism and avant-garde: Introduction / Jan Beekman. Jan de Vries. Avant-Garde and criticism.(2007).
Lua i Stíl Chicago (17ú heag.)Beekman, Jan, agus Jan de Vries. "Criticism and Avant-garde: Introduction / Jan Beekman. Jan De Vries." Avant-Garde and Criticism.(2007) .
Lua MLA (8ú heag.)Beekman, Jan, agus Jan de Vries. "Criticism and Avant-garde: Introduction / Jan Beekman. Jan De Vries." Avant-Garde and Criticism.(2007), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.