Mills, Geoffrey E. Educational research : competencies for analysis and applications / Geoffrey E. Mills,L.R. Gay. - พิมพ์ครั้งที่ 11 - Boston : : Pearson,, 2016 - 697 : 27ซ.ม. - V. 1 . Includes bibliographical references and index ISBN: 9781292106175: 1.00 Subjects--Topical Terms: Education--Research National Library of Medicine Call No.: LB 1028 / M645e