Kenneth B Kahn. (2001). New Product Planning. Response Books.
Lua i Stíl Chicago (17ú heag.)Kenneth B Kahn. New Product Planning. New Delhi: Response Books, 2001.
Lua MLA (9ú heag.)Kenneth B Kahn. New Product Planning. Response Books, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.