Educational research :
R. Johnson, Burke.
Educational research : quantitative, qualitative, and mixed approaches / R. Burke Johnson, Larry Christensen. - 7th ed. - Thousand Oaks, Calif. : Sage, 2020. - xxxi, 672 p. : ill.
Includes bibliographical references and index.
9781544337838
Education--Research.
Science--Experiments--Methodology
Experimental design
Educational research : quantitative, qualitative, and mixed approaches / R. Burke Johnson, Larry Christensen. - 7th ed. - Thousand Oaks, Calif. : Sage, 2020. - xxxi, 672 p. : ill.
Includes bibliographical references and index.
9781544337838
Education--Research.
Science--Experiments--Methodology
Experimental design