Cite

43. James Blanchard autograph letter signed, Oquawka, Illinois, to William Smith at Knoxville, Illinois

MLA

43. James Blanchard Autograph Letter Signed, Oquawka, Illinois, to William Smith at Knoxville, Illinois. 1846. https://collections.library.yale.edu/catalog/2054620.

APA, 6th edition

43. James Blanchard autograph letter signed, Oquawka, Illinois, to William Smith at Knoxville, Illinois. (1846). https://collections.library.yale.edu/catalog/2054620.