Riley, B. (2016). The edge of the Empire: A journey to Britannia : from the heart of Rome to Hadrian's Wall (First Pegasus Books hardcover edition.). Pegasus Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRiley, Bronwen. The Edge of the Empire: A Journey to Britannia : From the Heart of Rome to Hadrian's Wall. First Pegasus Books hardcover edition. New York: Pegasus Books, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRiley, Bronwen. The Edge of the Empire: A Journey to Britannia : From the Heart of Rome to Hadrian's Wall. First Pegasus Books hardcover edition. Pegasus Books, 2016.
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