APA-ийн эшлэл(7 дахь хэвлэлт)
Nowlan, R. A. (2012). The American presidents, Washington to Tyler: What they did, what they said, what was said about them, with full source notes. McFarland & Co..
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Nowlan, Robert A. The American Presidents, Washington to Tyler: What They Did, What They Said, What Was Said About Them, with Full Source Notes. Jefferson, N.C.: McFarland & Co., 2012.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Nowlan, Robert A. The American Presidents, Washington to Tyler: What They Did, What They Said, What Was Said About Them, with Full Source Notes. McFarland & Co., 2012.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.