Παραπομπή σε μορφή APA (7η εκδ.)

Barr, N. A. (2002). The pension puzzle: Prerequisites and policy choices in pension design. International Monetary Fund.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Barr, N. A. The Pension Puzzle: Prerequisites and Policy Choices in Pension Design. Washington, D.C: International Monetary Fund, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Barr, N. A. The Pension Puzzle: Prerequisites and Policy Choices in Pension Design. International Monetary Fund, 2002.