Bausum, A. (2013). Our country's Presidents: All you need to know about the presidents, from George Washington to Barack Obama (4th trade ed.). National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBausum, Ann. Our Country's Presidents: All You Need to Know About the Presidents, from George Washington to Barack Obama. 4th trade ed. Washington, D.C.: National Geographic, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBausum, Ann. Our Country's Presidents: All You Need to Know About the Presidents, from George Washington to Barack Obama. 4th trade ed. National Geographic, 2013.
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