Johnson, Burke Educational research : quantitative, qualitative, and mixed approaches / Burke Johnson, Larry Christensen. - 2nd ed. - Boston : Pearson/Allyn and Bacon, c2004. - xxvii, 564 p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 0205361269 (hbk) Subjects--Topical Terms: Education--Research. Dewey Class. No.: 370.72 / JOH