Marshall, T. (2018). The age of walls: How barriers between nations are changing our world (First Scribner hardcover edition.). Scribner.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarshall, Tim. The Age of Walls: How Barriers Between Nations Are Changing Our World. First Scribner hardcover edition. New York: Scribner, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMarshall, Tim. The Age of Walls: How Barriers Between Nations Are Changing Our World. First Scribner hardcover edition. Scribner, 2018.
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