APA
Estella A., . (2002). The EU Principle of Subsidiarity and its Critique. USA: Oxford University Press.
Chicago
Estella Antonio, . 2002. The EU Principle of Subsidiarity and its Critique. USA: Oxford University Press.
Harvard
Estella A., . (2002). The EU Principle of Subsidiarity and its Critique. USA: Oxford University Press.
MLA
Estella Antonio, . The EU Principle of Subsidiarity and its Critique. USA: Oxford University Press. 2002.