National Development Group for Educational Innovation & Sumagaysay, L. S. (1980). In-service education for primary teachers: Design formulation. National Development Group for Educational Innovation.
Цитирование в стиле Чикаго (17-е изд.)National Development Group for Educational Innovation и Lourdes S. Sumagaysay. In-service Education for Primary Teachers: Design Formulation. Manila: National Development Group for Educational Innovation, 1980.
Цитирование MLA (9-е изд.)National Development Group for Educational Innovation и Lourdes S. Sumagaysay. In-service Education for Primary Teachers: Design Formulation. National Development Group for Educational Innovation, 1980.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.