Haandrikman, K. (2001). Populatioin research centre university of groningen.
Cita Chicago (17th ed.)Haandrikman, Karen. Populatioin Research Centre University of Groningen. 2001.
Cita MLA (8th ed.)Haandrikman, Karen. Populatioin Research Centre University of Groningen. 2001.
Atenció: Aquestes cites poden no estar 100% correctes.