ملخص الدراسة:

توثيق المرجعي (APA)

حسين حرزالله, رفعت (2017). the role of prparatory unrwa schools principals principals in gaza governorates to improve the efficiencies of science teachers in accordance with the total quality standards and ways to develelop it. الجامعة الإسلامية - غزة. 17422