Educational research :
Gay, L. R.
Educational research : competencies for analysis and applications / L.R. Gay, Geoffrey E. Mills, Peter Airasian. - 8th ed. - Upper Saddle River, N.J. : Pearson Merrill Prentice Hall, c2006. - xix, 614 p. : ill. ;
0131185349
Education--Research.
LB1028 / .G37 2006
Educational research : competencies for analysis and applications / L.R. Gay, Geoffrey E. Mills, Peter Airasian. - 8th ed. - Upper Saddle River, N.J. : Pearson Merrill Prentice Hall, c2006. - xix, 614 p. : ill. ;
0131185349
Education--Research.
LB1028 / .G37 2006