Zacks, R. (2016). Chasing the last laugh: Mark Twain's raucous and redemptive round-the-world comedy tour (First edition.). Doubleday.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZacks, Richard. Chasing the Last Laugh: Mark Twain's Raucous and Redemptive Round-the-world Comedy Tour. First edition. New York: Doubleday, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZacks, Richard. Chasing the Last Laugh: Mark Twain's Raucous and Redemptive Round-the-world Comedy Tour. First edition. Doubleday, 2016.
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