APA (7 वां संस्करण) प्रशस्ति पत्र

Tignor, R. L. (2014). Worlds together, worlds apart, volume 2: From 1000 CE to the present (Fourth edition.). W. W. Norton and Company.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Tignor, Robert L. Worlds Together, Worlds Apart, Volume 2: From 1000 CE to the Present. Fourth edition. New York ; London: W. W. Norton and Company, 2014.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Tignor, Robert L. Worlds Together, Worlds Apart, Volume 2: From 1000 CE to the Present. Fourth edition. W. W. Norton and Company, 2014.