| | Introduction to Research in Education(9th Edition) by Donald Ary, Lucy Cheser Jacobs, Christine K. Sorensen, Dr David Walker, David A. Walker, Christine Sorensen Irvine Hardcover, 720 Pages, Published 2013 by Wadsworth Publishing Abridged ISBN-13: 978-1-133-59674-5, ISBN: 1-133-59674-6
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