McArdle, Geri. Developing Instructional Design : A Step-by-Step Guide to Success. Menlo Park, CA, USA: Course Technology Crisp, 1991. p 9 http://site.ebrary.com/lib/yildizholding/Doc?id=10058900&ppg=9 Copyright Š 1991. Course Technology Crisp. All rights Reserved. May not be reproduced in any form without permission from the publisher, except fair uses permitted under U.S. or applicable copyright law.