HARVARD BUSINESS REVIEW. (1997). CLASSIC ADVICE ON MANAING SYSTEMS. HARPER & ROW.
Lua i Stíl Chicago (17ú heag.)HARVARD BUSINESS REVIEW. CLASSIC ADVICE ON MANAING SYSTEMS. HARPER & ROW, 1997.
Lua MLA (9ú heag.)HARVARD BUSINESS REVIEW. CLASSIC ADVICE ON MANAING SYSTEMS. HARPER & ROW, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.