Orejana, E. N. (1981). The relationship between some personal and environmental factors and children's performance on some Piagetian tasks: A concluding issue of the Review of Philippine Studies based on Piagets theory of cognitive development. Research Center, Philippine Normal College.
Παραπομπή σε μορφή Chicago (17η εκδ.)Orejana, Evelyn N. The Relationship Between Some Personal and Environmental Factors and Children's Performance on Some Piagetian Tasks: A Concluding Issue of the Review of Philippine Studies Based on Piagets Theory of Cognitive Development. Manila: Research Center, Philippine Normal College, 1981.
Παραπομπή σε μορφή MLA (9th εκδ.)Orejana, Evelyn N. The Relationship Between Some Personal and Environmental Factors and Children's Performance on Some Piagetian Tasks: A Concluding Issue of the Review of Philippine Studies Based on Piagets Theory of Cognitive Development. Research Center, Philippine Normal College, 1981.