Leedy,, Paul D.
Practical research : planning and design / Paul D. Leedy ; colab. Timothy J. Newby, Peggy A. Ertmer
Practical research : planning and design / Paul D. Leedy ; colab. Timothy J. Newby, Peggy A. Ertmer
. - 6th ed
. - Upper Saddle River : Merrill, cop. 1997
. - XVI, 304 p. : il. gráficos 28 cm
0-13-241407-4 (Brochado)
001.891