Ecchevarría, R. G. Sarduy and the Visual Text: Roberto González Ecchevarría. Experimental - visual - concrete : Avant-Garde Poetry since the 1960s.(1996).
Lua i Stíl Chicago (17ú heag.)Ecchevarría, Roberto González. "Sarduy and the Visual Text: Roberto González Ecchevarría." Experimental - Visual - Concrete : Avant-Garde Poetry Since the 1960s.(1996) .
Lua MLA (8ú heag.)Ecchevarría, Roberto González. "Sarduy and the Visual Text: Roberto González Ecchevarría." Experimental - Visual - Concrete : Avant-Garde Poetry Since the 1960s.(1996), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.