HARVARD BUSINESS REVIEW. (1976). PRODUCT POLICY FOR COMSUMER GOODS COMPANIES. HARVARD BUSINESS REVIEW.
Lua i Stíl Chicago (17ú heag.)HARVARD BUSINESS REVIEW. PRODUCT POLICY FOR COMSUMER GOODS COMPANIES. BOSTON: HARVARD BUSINESS REVIEW, 1976.
Lua MLA (9ú heag.)HARVARD BUSINESS REVIEW. PRODUCT POLICY FOR COMSUMER GOODS COMPANIES. HARVARD BUSINESS REVIEW, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.