DK Publishing, Inc, & Smithsonian Institution. (2018). Timelines of history (Second edition.). DK Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDK Publishing, Inc, और Smithsonian Institution. Timelines of History. Second edition. New York, New York: DK Publishing, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDK Publishing, Inc, और Smithsonian Institution. Timelines of History. Second edition. DK Publishing, 2018.
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