APA-referens (7:e uppl.)
Causa, O., & Cohen, D. (2006). The ladder of competitiveness: How to climb it. Development Centre of the Organisation for Economic Co-operation and Development.
Chicago-referens (17:e uppl.)
Causa, Orsetta, och Daniel Cohen. The Ladder of Competitiveness: How to Climb It. Paris: Development Centre of the Organisation for Economic Co-operation and Development, 2006.
MLA-referens (9:e uppl.)
Causa, Orsetta, och Daniel Cohen. The Ladder of Competitiveness: How to Climb It. Development Centre of the Organisation for Economic Co-operation and Development, 2006.
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