Johnson, Burke. Educational research quantitative, qualitative, and mixed approaches Burke Johnson, Larry Christensen. - 2nd ed. - Thousand Oaks,CA Sage Publications c2012. - xxvi,621 p. ill. 25 cm. Includes bibliographical references and index. ISBN: 9781412978286 Subjects--Topical Terms: Education--Research. LC Class. No.: LB1028 / .J59 2012 Dewey Class. No.: 370.72 / J661e4