APA (7 वां संस्करण) प्रशस्ति पत्र
Van Inwagen, P. (2008). The problem of evil: The Gifford lectures delivered in the University of St. Andrews in 2003. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Van Inwagen, Peter. The Problem of Evil: The Gifford Lectures Delivered in the University of St. Andrews in 2003. Oxford: Oxford University Press, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Van Inwagen, Peter. The Problem of Evil: The Gifford Lectures Delivered in the University of St. Andrews in 2003. Oxford University Press, 2008.
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