Παραπομπή σε μορφή APA (7η εκδ.)

Tortola, P., & King, D. (2012). Federalism, the state and the city: Explaining urban policy institutions in the United States and in the European Union.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Tortola, P., και D. King. Federalism, the State and the City: Explaining Urban Policy Institutions in the United States and in the European Union. 2012.

Παραπομπή σε μορφή MLA (9th εκδ.)

Tortola, P., και D. King. Federalism, the State and the City: Explaining Urban Policy Institutions in the United States and in the European Union. 2012.