Duffy, C. M. (1966). Katharine Drexel: A biography. P. Reilly Co..
Lua i Stíl Chicago (17ú heag.)Duffy, Consuela Marie. Katharine Drexel: A Biography. Philadelphia: P. Reilly Co., 1966.
Lua MLA (8ú heag.)Duffy, Consuela Marie. Katharine Drexel: A Biography. P. Reilly Co., 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.