Philippines. Department of Education, Culture and Sports. Research and Statistics Division. Office of the Planning Service. (1990). Basic education statistics: SY 1985-1986 to SY 1989-1990. Research and Statistics Division, Office of the Planning Service.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPhilippines. Department of Education, Culture and Sports. Research and Statistics Division. Office of the Planning Service. Basic Education Statistics: SY 1985-1986 to SY 1989-1990. Pasig, Metro Manila: Research and Statistics Division, Office of the Planning Service, 1990.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিPhilippines. Department of Education, Culture and Sports. Research and Statistics Division. Office of the Planning Service. Basic Education Statistics: SY 1985-1986 to SY 1989-1990. Research and Statistics Division, Office of the Planning Service, 1990.