Cita APA (7a ed.)

Duffy, C. M. (1966). Katharine Drexel: A biography. P. Reilly Co..

Cita Chicago Style (17a ed.)

Duffy, Consuela Marie. Katharine Drexel: A Biography. Philadelphia: P. Reilly Co., 1966.

Cita MLA (8a ed.)

Duffy, Consuela Marie. Katharine Drexel: A Biography. P. Reilly Co., 1966.