(2012). Vibal upgrades learning materials with K to 12 curriculum textbooks. Philippine Star.
Chicagoスタイル(17版)引用形式"Vibal Upgrades Learning Materials with K to 12 Curriculum Textbooks." Philippine Star 2012.
MLA(9版)引用形式"Vibal Upgrades Learning Materials with K to 12 Curriculum Textbooks." Philippine Star, 2012.
警告: この引用は必ずしも正確ではありません.