West, D. (2006). Strategic Marketing (3rd.). Prenctice-Hall India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)West, Douglas. Strategic Marketing. 3rd. New Delhi: Prenctice-Hall India Pvt. Ltd, 2006.
Lua MLA (9ú heag.)West, Douglas. Strategic Marketing. 3rd. Prenctice-Hall India Pvt. Ltd, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.