MLA

Douglass, Frederick, 1818-1895, Garrison, William Lloyd, 1805-1879. Narrative of the life of Frederick Douglass, an American slave / written by himself.. 1846. https://collections.library.yale.edu/catalog/12315081.

APA, 6th edition

Douglass, Frederick, 1818-1895, & Garrison, William Lloyd, 1805-1879. (1846)[Narrative of the life of Frederick Douglass, an American slave / written by himself.]. https://collections.library.yale.edu/catalog/12315081.