Bautista Romeo Marcelo & Tecson, G. R. (1976). Philippine trade with Japan and the United States: Examination of recorded data and analysis of export performance [microform]. Photoduplication Service, University of the Philippines.
Chicago-referens (17:e uppl.)Bautista Romeo Marcelo och Gwendolyn Rosario Tecson. Philippine Trade with Japan and the United States: Examination of Recorded Data and Analysis of Export Performance [microform]. Quezon City: Photoduplication Service, University of the Philippines, 1976.
MLA-referens (9:e uppl.)Bautista Romeo Marcelo och Gwendolyn Rosario Tecson. Philippine Trade with Japan and the United States: Examination of Recorded Data and Analysis of Export Performance [microform]. Photoduplication Service, University of the Philippines, 1976.