CHOFFRAY JEAN-MARIE. (1980). MARKETING PLANNING FOR NEW INDUSTRIAL PRODUCTS. JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)CHOFFRAY JEAN-MARIE. MARKETING PLANNING FOR NEW INDUSTRIAL PRODUCTS. JOHN WILEY AND SONS, 1980.
Lua MLA (9ú heag.)CHOFFRAY JEAN-MARIE. MARKETING PLANNING FOR NEW INDUSTRIAL PRODUCTS. JOHN WILEY AND SONS, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.