Proctor, Tony. Essentials of marketing research / Tony Proctor. - 3rd ed. - Harlow, England : FT/Prentice Hall, 2003. - xvi, 560 p. : ill. ; 25 cm. Includes bibl. references and index. ISBN: 0273674005 : SR164.00 Subjects--Topical Terms: Marketing research. Dewey Class. No.: 658.83 / P942 2003