Cooper, Donald. R Business Research methods/ Donald R. Cooper. - Boston: Mc Graw Hill, 2008.. - xxii, 746p. : ill. ; 28 cm. Includes index. Bibliography: p. 276-281. eng. ISBN: 9780071263337 TZS 100,395.5/= Subjects--Topical Terms: Business methodsresearch methods Dewey Class. No.: 650.072. COO