Zikmund, William G. Essentials of marketing research / William G. Zikmund. - Fort Worth, TX : Dryden Press, 1999. - xxii, 422 p. : ill. ; 26 cm. Includes bibliographical references and index. ISBN: 0030243564 RM307.53 LCCN: 98-071173 Subjects--Topical Terms: Marketing research.