Ali, S., Abdel Messeh, A., Mohamed, R., Khalifa, M. (2019). THE EFFECTIVENESS OF AN ENRICHMENT PROGRAM BASED ON PROBLEM CENTERED LEARNING STRATEGY ON DEVELOPING ENVIRONMENTAL ETHICS AND INTELLIGENCE AMONG PREPARATORY STAGE PUPILS. test, 45(2), 219-266. doi: 10.21608/jes.2019.56176
Safya A. M. Ali; Abdel Messeh S. Abdel Messeh; Reham R. Mohamed; Mai E. Khalifa. "THE EFFECTIVENESS OF AN ENRICHMENT PROGRAM BASED ON PROBLEM CENTERED LEARNING STRATEGY ON DEVELOPING ENVIRONMENTAL ETHICS AND INTELLIGENCE AMONG PREPARATORY STAGE PUPILS". test, 45, 2, 2019, 219-266. doi: 10.21608/jes.2019.56176
Ali, S., Abdel Messeh, A., Mohamed, R., Khalifa, M. (2019). 'THE EFFECTIVENESS OF AN ENRICHMENT PROGRAM BASED ON PROBLEM CENTERED LEARNING STRATEGY ON DEVELOPING ENVIRONMENTAL ETHICS AND INTELLIGENCE AMONG PREPARATORY STAGE PUPILS', test, 45(2), pp. 219-266. doi: 10.21608/jes.2019.56176
Ali, S., Abdel Messeh, A., Mohamed, R., Khalifa, M. THE EFFECTIVENESS OF AN ENRICHMENT PROGRAM BASED ON PROBLEM CENTERED LEARNING STRATEGY ON DEVELOPING ENVIRONMENTAL ETHICS AND INTELLIGENCE AMONG PREPARATORY STAGE PUPILS. test, 2019; 45(2): 219-266. doi: 10.21608/jes.2019.56176