APA
Lenaerts Koen, Nuffel Piet Van, . (2005). Constitutional law of the European union. London: Sweet & Maxwell.
Chicago
Lenaerts Koen, Nuffel Piet Van, . 2005. Constitutional law of the European union. London: Sweet & Maxwell.
Harvard
Lenaerts Koen, Nuffel Piet Van, . (2005). Constitutional law of the European union. London: Sweet & Maxwell.
MLA
Lenaerts Koen, Nuffel Piet Van, . Constitutional law of the European union. London: Sweet & Maxwell. 2005.