Παραπομπή σε μορφή APA (7η εκδ.)

Nagle, G., & Spencer, K. (1996). A geography of the European Union: A regional and economic perspective. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nagle, Garrett, και Kris Spencer. A Geography of the European Union: A Regional and Economic Perspective. Oxford: Oxford University Press, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nagle, Garrett, και Kris Spencer. A Geography of the European Union: A Regional and Economic Perspective. Oxford University Press, 1996.