Cooper, Donald R. Business research methods / Donald R. Cooper, Pamela S. Schindler. - 9th International ed. - Boston : Mcgraw Hill, c2006. - xxi, 744 p. : chiefly col.ill. - The Mcgraw Hill / Irwin series [on] operations and decision series . Includes appendices, glossary, and index. Subjects--Topical Terms: Business--Research.