Text ( visual ) : unmediated Applying educational research : how to read, do, and use research to solve problems of practice / M. D. Gall, Joyce P. Gall, Walter R. Borg. -- 6th ed. -- : pbk. -- Boston : Pearson , c2010. -- xxvi, 573 p. : ill. ; 28 cm. -- Includes bibliographical references and indexes. -- ISBN 9780205596706 ; (BB05649355) ; https://ci.nii.ac.jp/ncid/BB05649355 Author Heading(s): Gall, Meredith D. ; Gall, Joyce P. ; Borg, Walter R.. -- Classification(s): LCC : LB1028 ; DC22 : 370.7/2. -- Subject Heading(s): LCSH : Education -- Research -- Handbooks, manuals, etc