APA (7 वां संस्करण) प्रशस्ति पत्र
Aers, D. (2009). Salvation and sin: Augustine, Langland, and fourteenth-century theology. University of Notre Dame Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Aers, David. Salvation and Sin: Augustine, Langland, and Fourteenth-century Theology. Notre Dame, Ind.: University of Notre Dame Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Aers, David. Salvation and Sin: Augustine, Langland, and Fourteenth-century Theology. University of Notre Dame Press, 2009.
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