Cita APA (7a ed.)

Leuffen, D., Rittberger, B., & Schimmelfennig, F. (2011). Differentiated integration: Explaining variation in the Europena Union (1st published.). Palgrave Macmillan.

Cita Chicago Style (17a ed.)

Leuffen, Dirk, Berthold Rittberger, y Frank Schimmelfennig. Differentiated Integration: Explaining Variation in the Europena Union. 1st published. Basingstoke: Palgrave Macmillan, 2011.

Cita MLA (9a ed.)

Leuffen, Dirk, et al. Differentiated Integration: Explaining Variation in the Europena Union. 1st published. Palgrave Macmillan, 2011.