Leedy, Paul D. Practical research planning and design; a basic text for all course in research methodology Paul D. Leedy. - 4th ed. - New York London Macmillan Collier Macmillan c1989. - xi, 318 p. Includes index. ISBN: LCCN: 79012922 //r84 Subjects--Topical Terms: Research--Methodology. LC Class. No.: Q180.55.M4 / L43 1980 Dewey Class. No.: 001.4/2