Cita APA (7a ed.)

O'Duffy, E. (1938). Crusade in Spain. R. Hale, Limited; [etc., etc.].

Cita Chicago Style (17a ed.)

O'Duffy, Eoin. Crusade in Spain. London: R. Hale, Limited; [etc., etc.], 1938.

Cita MLA (9a ed.)

O'Duffy, Eoin. Crusade in Spain. R. Hale, Limited; [etc., etc.], 1938.