APA
Kelsen H., Schmitt C. & Vinx L. (2015). The guardian of the constitution. United Kingdom: Cambridge University Press.
Chicago
Kelsen Hans, Schmitt Carl and Vinx Lars. 2015. The guardian of the constitution. United Kingdom: Cambridge University Press.
Harvard
Kelsen H., Schmitt C. and Vinx L. (2015). The guardian of the constitution. United Kingdom: Cambridge University Press.
MLA
Kelsen Hans, Schmitt Carl and Vinx Lars. The guardian of the constitution. United Kingdom: Cambridge University Press. 2015.