Causa, O., & Cohen, D. (2006). The ladder of competitiveness: How to climb it. Development Centre of the Organisation for Economic Co-operation and Development.
Lua i Stíl Chicago (17ú heag.)Causa, Orsetta, agus Daniel Cohen. The Ladder of Competitiveness: How to Climb It. Paris: Development Centre of the Organisation for Economic Co-operation and Development, 2006.
Lua MLA (9ú heag.)Causa, Orsetta, agus Daniel Cohen. The Ladder of Competitiveness: How to Climb It. Development Centre of the Organisation for Economic Co-operation and Development, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.