Παραπομπή σε μορφή APA (7η εκδ.)

Drud Hansen, J., & Johnson, H. (1997). An economic analysis of the EU (2nd edition.). McGraw - Hill Companies.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Drud Hansen, Jorgen, και Halfdan Johnson. An Economic Analysis of the EU. 2nd edition. London: McGraw - Hill Companies, 1997.

Παραπομπή σε μορφή MLA (8th εκδ.)

Drud Hansen, Jorgen, και Halfdan Johnson. An Economic Analysis of the EU. 2nd edition. McGraw - Hill Companies, 1997.