Παραπομπή σε μορφή APA (7η εκδ.)

Verbeek, J. (1999). The World Bank's unified survey projections: How accurate are theyn. World Bank.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Verbeek, Jos. The World Bank's Unified Survey Projections: How Accurate Are Theyn. Washington, D.C: World Bank, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Verbeek, Jos. The World Bank's Unified Survey Projections: How Accurate Are Theyn. World Bank, 1999.