Salvador, E. C. (1979). An analysis of the attendance and dropouts of the public elementary school pupils in the Division of Isabela for the school years 1965-66 to 1969-70 [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-Zitierstil (17. Ausg.)Salvador, Estelita Cristobal. An Analysis of the Attendance and Dropouts of the Public Elementary School Pupils in the Division of Isabela for the School Years 1965-66 to 1969-70 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1979.
MLA-Zitierstil (9. Ausg.)Salvador, Estelita Cristobal. An Analysis of the Attendance and Dropouts of the Public Elementary School Pupils in the Division of Isabela for the School Years 1965-66 to 1969-70 [microform]. Photoduplication Service, University of the Philippines Library, 1979.