Παραπομπή σε μορφή APA (7η εκδ.)

National Development Group for Educational Innovation & Sumagaysay, L. S. (1980). In-service education for primary teachers: Design formulation. National Development Group for Educational Innovation.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Development Group for Educational Innovation και Lourdes S. Sumagaysay. In-service Education for Primary Teachers: Design Formulation. Manila: National Development Group for Educational Innovation, 1980.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Development Group for Educational Innovation και Lourdes S. Sumagaysay. In-service Education for Primary Teachers: Design Formulation. National Development Group for Educational Innovation, 1980.