Concepcion, S. Z. (1974). An inquiry into "the mission of the [USAFFE and the role played by the Filipino soldiers in the Philippine defense campaign of 1941-1942" [microform]. Photoduplication Service, University of the Philippines Library.
Παραπομπή σε μορφή Chicago (17η εκδ.)Concepcion, Sofronio Z. An Inquiry into "the Mission of the [USAFFE and the Role Played by the Filipino Soldiers in the Philippine Defense Campaign of 1941-1942" [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
Παραπομπή σε μορφή MLA (9th εκδ.)Concepcion, Sofronio Z. An Inquiry into "the Mission of the [USAFFE and the Role Played by the Filipino Soldiers in the Philippine Defense Campaign of 1941-1942" [microform]. Photoduplication Service, University of the Philippines Library, 1974.