Lettinga, D., Keulemans, S.A.C. & M. Smit (2013), Verblijfsregelingen voor slachtoffers van mensenhandel en oneigenlijk gebruik. Een verkennende studie in het Verenigd Koninkrijk, Italië en België (WODC: Cahier 2013-3)
Lettinga, D. & Braakman, M. (2013), A social fieldworkstudy on redress mechanisms in the area of dataprotection. Country report The Netherlands. Report commissioned by the European Union Agency for Fundamental Rights (intern rapport, Art. 1). Resulteerde in FRA handboek (2013) Access to data protection remedies in EU member states: http://fra.europa.eu/sites/default/files/fra-2014-access-data-protection-remedies_en.pdf.
Human Rights Watch (2012), ‘The Law was against me’. Migrant women’s access to Protection for Family Violence in Belgium: http://www.hrw.org/sites/default/files/reports/belgium1112webwcover.pdf
Eijkman, Q., Lettinga D. & G. Verbossen (2012), Impact of counter-terrorism on communities: Netherlands background report (Open Society Foundations/ Institute for Strategic Dialogue): http://www.strategicdialogue.org/Netherlands_FINAL.pdf.
Lettinga, D. (2006), VEIL: Values, Equality and Differences in Liberal Democracies. Debates about Female Muslim Headscarves in Europe. The Netherlands country report. Samenvatting op: http://www.veil-project.eu/.