MLA

Serge, Victor, 1890-1947. To José Aguilar y Maya, Procurador General de Justicia de la República Ciudad, typescript carbon. Box 13, folder 507. 1944 Jul 5. https://collections.library.yale.edu/catalog/16495488.

APA, 6th edition

Serge, Victor, 1890-1947. (["Box 13, folder 507"])(1944 Jul 5)[To José Aguilar y Maya, Procurador General de Justicia de la República Ciudad, typescript carbon]. https://collections.library.yale.edu/catalog/16495488.