Frederick Douglass’ paper
MLA
Douglass, Frederick, 1818-1895. Frederick Douglass’ paper. 1851 September 4. https://collections.library.yale.edu/catalog/16600293.
APA, 6th edition
Douglass, Frederick, 1818-1895. (1851 September 4)[Frederick Douglass’ paper]. https://collections.library.yale.edu/catalog/16600293.