Zikmund, William G. Business research methods / William G. Zikmund. - 7th ed. - Australia, Canada, ; Mason, OH : Thomson/South-Western, c2003. - xix, 748 p. : ill. (some col.) ; 27 cm. Includes bibliographical references and index. ISBN: 0030350840 Subjects--Topical Terms: Management--Research.Business--Research.