Cita APA (7a ed.)

Barnard, C. (2007). The substantive law of the EU: The four freedoms (2nd ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Barnard, Catherine. The Substantive Law of the EU: The Four Freedoms. 2nd ed. Oxford ; New York: Oxford University Press, 2007.

Cita MLA (9a ed.)

Barnard, Catherine. The Substantive Law of the EU: The Four Freedoms. 2nd ed. Oxford University Press, 2007.