Practical research : planning and design / Paul D. Leedy
Leedy, Paul D.
Practical research : planning and design / Paul D. Leedy - 5th ed - New York : Macmillan Publishing Company, 1993
0-02-369242-1
Research--Methodology
Investigación Científica--Planificación
Practical research : planning and design / Paul D. Leedy - 5th ed - New York : Macmillan Publishing Company, 1993
0-02-369242-1
Research--Methodology
Investigación Científica--Planificación