Emory, C. William Business research methods / C. William Emory and Donald R. Cooper. - 4th ed. - Homewood, IL : Irwin, c1991. - xxiii, 760 p. : ill., figs., tabs. ; 25 cm. Includes bibliographical references and index. ISBN: 0256092656 9780256092653 Subjects--Topical Terms: Industrial management--Research LC Class. No.: HD30.4 / .E46 1991 Dewey Class. No.: 658.0072 / E54b