George, D. (2021). The Radical Campaigns of John Baxter Langley: A Keen and Courageous Reformer. University of Exeter Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeorge, David. The Radical Campaigns of John Baxter Langley: A Keen and Courageous Reformer. Exeter: University of Exeter Press, 2021.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGeorge, David. The Radical Campaigns of John Baxter Langley: A Keen and Courageous Reformer. University of Exeter Press, 2021.
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