Practical research :
Leedy, Paul D.
Practical research : planning and design / Paul D. Leedy, Jeanne Ellis Ormrod. - 10th ed. - Boston : Pearson, 2013. - xix, 364 p. : ill. ; 28 cm.
Includes bibliographical references and index.
9780132693240
Research.
Investigación científica.
Investigación científica.
001.4 / LEE
Practical research : planning and design / Paul D. Leedy, Jeanne Ellis Ormrod. - 10th ed. - Boston : Pearson, 2013. - xix, 364 p. : ill. ; 28 cm.
Includes bibliographical references and index.
9780132693240
Research.
Investigación científica.
Investigación científica.
001.4 / LEE