Cita APA (7a ed.)

Barnard, C. (2013). The Substantive law of the EU: The four freedoms (4th ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Barnard, Catherine. The Substantive Law of the EU: The Four Freedoms. 4th ed. Oxford, United Kingdom: Oxford University Press, 2013.

Cita MLA (9a ed.)

Barnard, Catherine. The Substantive Law of the EU: The Four Freedoms. 4th ed. Oxford University Press, 2013.