Duckworth, C. (1972). Angels of darkness: Dramatic effect in Samuel Beckett with special reference to Eugène Ionesco. Barnes & Noble Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDuckworth, Colin. Angels of Darkness: Dramatic Effect in Samuel Beckett with Special Reference to Eugène Ionesco. New York: Barnes & Noble Books, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDuckworth, Colin. Angels of Darkness: Dramatic Effect in Samuel Beckett with Special Reference to Eugène Ionesco. Barnes & Noble Books, 1972.
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