Zikmund, William G. Business research methods / William G. Zikmund - 5th. ed. - Forth Worth, Texas Dryden Press, 1997. - xxi, 829 p.: ill.; 24 cm. - The Dryden Press series in management . Includes bibliographical references Includes index ISBN: 0030184320 Subjects--Topical Terms: Business--Research Management--Research