Masangkay, N. V. (1977). Perceived values of modern mathematics of selected teachers in the Division Occidental Mindoro [microform]. Photoduplication Service. University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Masangkay, Nicolas Villamar. Perceived Values of Modern Mathematics of Selected Teachers in the Division Occidental Mindoro [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Lua MLA (9ú heag.)Masangkay, Nicolas Villamar. Perceived Values of Modern Mathematics of Selected Teachers in the Division Occidental Mindoro [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.