(en) Lynn Maria Hudson, The Making of "Mammy Pleasant": A Black Entrepreneur in Nineteenth-century San Francisco, University of Illinois Press, (ISBN978-0-252-02771-0, lire en ligne), p. 24
(en) Lynn Maria Hudson, The Making of "Mammy Pleasant": A Black Entrepreneur in Nineteenth-century San Francisco, University of Illinois Press, (ISBN978-0-252-02771-0, lire en ligne)
(en) Susan Boardman et Betsey Tyler, Sometimes THink of Me, Nantucket Historical Association, (ASINB004G7SYLU, lire en ligne)
openlibrary.org
Hudson, Lynn Maria, The Making of "Mammy Pleasant": A Black Entrepreneur in Nineteenth-Century San Francisco, University of Illinois Press, (ISBN0252075277, lire en ligne)