Leedy, Paul D. Practical research : planning and design / Paul D. Leedy. - 6th ed. / with contributions by Timothy J. Newby and Peggy A. Ertmer. - Upper Saddle River, N.J. : Merrill, 1997. - xvi, 304 p. : ill. (some col.), col. maps ; 28 cm. Includes bibliographical references and index. ISBN: 0132414074 (pbk.) LCCN: 96009917 Subjects--Topical Terms: Research--Methodology. LC Class. No.: Q180.55.M4 / LEE 1997 Dewey Class. No.: 001.4