in Stephen Douglas (University of Texas Press, 1971) pp. 12–54. on Douglas and Buchanan. online
Primary sources
Buchanan, James. Fourth Annual Message to Congress. Archived September 12, 2018, at the Wayback Machine (December 3, 1860).
Buchanan, James. Mr Buchanan's Administration on the Eve of the Rebellion (1866)
National Intelligencer (1859)

External links
.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}

Wikisource has original works by or about:James Buchanan

Wikiquote has quotations related to James Buchanan.

Wikimedia Commons has media related to James Buchanan.

United States Congress. "James Buchanan (id: B001005)". Biographical Directory of the United States Congress.
James Buchanan: A Resource Guide from the Library of Congress
The James Buchanan papers, spanning the entirety of his legal, political and diplomatic career, are available for research use at the Historical Society of Pennsylvania.
