Gay, Lorraine R. Educational research : competencies for analysis and application / by Lorraine R. Gay, Geoffrey E. Mills and Peter W. Airasian - 10th ed. - New Delhi: Pearson, 2015. - 595p.; 26cm. Includes bibliographical references. ISBN: 9789332541061 Subjects--Topical Terms: Education.Research--Education.Education research. Dewey Class. No.: 370.72 / GAY