Ecchevarría, R. G. Sarduy and the Visual Text: Roberto González Ecchevarría. Experimental - visual - concrete : Avant-Garde Poetry since the 1960s.(1996).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEcchevarría, Roberto González. "Sarduy and the Visual Text: Roberto González Ecchevarría." Experimental - Visual - Concrete : Avant-Garde Poetry Since the 1960s.(1996) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रEcchevarría, Roberto González. "Sarduy and the Visual Text: Roberto González Ecchevarría." Experimental - Visual - Concrete : Avant-Garde Poetry Since the 1960s.(1996), .
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