The materials in this work is subject to copy right. Because the Regional Center for Quality and Excellence in Education (RCQE) encourages dissemination of its knowledge, this work may be reproduced, in whole or in part, for noncommercial purposes as long as full attribution to the work is given.
For permission to reproduce any part of this work for commercial purposes and all other queries on rights and licenses, including subsidiary rights, please send a request with complete information to the international relations office at RCQE, P.O.BOX 94966 Building 6943 Umro Al Damri St. Diplomatic Quarter, Riyadh 11614 Saudi Arabia, telephone:+966-11-562-9700 ; email: info@rcqe.org.