Practical research : planning and design.
Leedy, Paul D.
Practical research : planning and design. - 5th edition. - New York : McMillan Publishing Company, 1993. - 348 pages ; 28 cm.
Includes bibliographical references and index.
Practical research : planning and design. - 5th edition. - New York : McMillan Publishing Company, 1993. - 348 pages ; 28 cm.
Includes bibliographical references and index.