Cita APA (7a ed.)

van der Gaag, N. (1999). National and regional population trends in the European Union: Nicole van der Gaag. European Commission.

Cita Chicago Style (17a ed.)

van der Gaag, Nicole. National and Regional Population Trends in the European Union: Nicole Van Der Gaag. Luxembourg: European Commission, 1999.

Cita MLA (8a ed.)

van der Gaag, Nicole. National and Regional Population Trends in the European Union: Nicole Van Der Gaag. European Commission, 1999.