Castro, E. G. (1975). P. T. A. contributions to the public schools in Pangasinan [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-referens (17:e uppl.)Castro, Eladio G. P. T. A. Contributions to the Public Schools in Pangasinan [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
MLA-referens (9:e uppl.)Castro, Eladio G. P. T. A. Contributions to the Public Schools in Pangasinan [microform]. Photoduplication Service, University of the Philippines Library, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.