Cita APA (7th ed.)

Van der Gaag, N., Van Imhoff, E., & Van Wissen, L. (1997). Long-term internal migration scenarios for the countries of the European Union. European Commission.

Cita Chicago (17th ed.)

Van der Gaag, Nicole, Evert Van Imhoff, i Leo Van Wissen. Long-term Internal Migration Scenarios for the Countries of the European Union. Luxembourg: European Commission, 1997.

Cita MLA (8th ed.)

Van der Gaag, Nicole, et al. Long-term Internal Migration Scenarios for the Countries of the European Union. European Commission, 1997.