[Copy letter signed] 1911 October 14 [to] Colonel Anderson
MLA
Augur, Christopher Columbus, 1821-1898. [Copy letter signed] 1911 October 14 [to] Colonel Anderson. Folder 5. Undated. https://collections.library.yale.edu/catalog/2054819.
APA, 6th edition
Augur, Christopher Columbus, 1821-1898. (["Folder 5"])(Undated)[[Copy letter signed] 1911 October 14 [to] Colonel Anderson]. https://collections.library.yale.edu/catalog/2054819.