Cita APA (7a ed.)

Congress of Historians from Mexico and the United States. (1949). Memoria. Proceedings. [s.n.].

Cita Chicago Style (17a ed.)

Congress of Historians from Mexico and the United States. Memoria. Proceedings. Mexico: [s.n.], 1949.

Cita MLA (9a ed.)

Congress of Historians from Mexico and the United States. Memoria. Proceedings. [s.n.], 1949.