National Development Group for Educational Innovation & Sumagaysay, L. S. (1980). In-service education for primary teachers: Design formulation. National Development Group for Educational Innovation.
Citação do estilo Chicago (17ª ed.)National Development Group for Educational Innovation e Lourdes S. Sumagaysay. In-service Education for Primary Teachers: Design Formulation. Manila: National Development Group for Educational Innovation, 1980.
Citação MLA (9ª ed.)National Development Group for Educational Innovation e Lourdes S. Sumagaysay. In-service Education for Primary Teachers: Design Formulation. National Development Group for Educational Innovation, 1980.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.