Παραπομπή σε μορφή APA (7η εκδ.)

Causa, O., & Cohen, D. (2006). The ladder of competitiveness: How to climb it. Development Centre of the Organisation for Economic Co-operation and Development.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Causa, Orsetta, και Daniel Cohen. The Ladder of Competitiveness: How to Climb It. Paris: Development Centre of the Organisation for Economic Co-operation and Development, 2006.

Παραπομπή σε μορφή MLA (9th εκδ.)

Causa, Orsetta, και Daniel Cohen. The Ladder of Competitiveness: How to Climb It. Development Centre of the Organisation for Economic Co-operation and Development, 2006.