APA (7 वां संस्करण) प्रशस्ति पत्र
Gray, J., & Fletcher, I. (1988). The Poetry of John Gray. ELT Press, Dept. of English, University of North Carolina.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Gray, John, और Ian Fletcher. The Poetry of John Gray. Greensboro, NC: ELT Press, Dept. of English, University of North Carolina, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Gray, John, और Ian Fletcher. The Poetry of John Gray. ELT Press, Dept. of English, University of North Carolina, 1988.
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