Mertler, Craig A. Introduction to educational research / Craig A. Mertler, C.M. Charles. - 7th ed. - Boston : Pearson/Allyn & Bacon, c2011. - xxvi, 405 p. : ill. ; 27 cm. Includes bibliographical references and indexes. ISBN: 9780137013449 (pbk.) 0137013442 (pbk.) Subjects--Topical Terms: Education--Research--Methodology. Dewey Class. No.: 370.72 / MER 2011