Marketing strategy : planning and implementation / Orville C. Walker, Jr. ; Harper W. Boyd, Jr. ; Jean-Claude Larreche. (1987). Chicago, IL: Irwin, c.
Marketing strategy : planning and implementation / Orville C. Walker, Jr. ; Harper W. Boyd, Jr. ; Jean-Claude Larreche. 2nd ed.. Chicago, IL: Irwin, c, 1987. Buku Wajib.