Cita APA (7a ed.)

Weckmann, L. (1951). The middle ages in the conquest of America. [s.n.].

Cita Chicago Style (17a ed.)

Weckmann, Luis. The Middle Ages in the Conquest of America. [S.l.]: [s.n.], 1951.

Cita MLA (9a ed.)

Weckmann, Luis. The Middle Ages in the Conquest of America. [s.n.], 1951.