SANDERS, Huub. Gerrit Voerman m.m.v. Lucas Osterholt, De VVD Visueel. Liberale affiches in de Twintigste Eeuw. TSEG - The Low Countries Journal of Social and Economic History, [S. l.], v. 5, n. 2, p. 180–182, 2008. DOI: 10.18352/tseg.524. Disponível em: https://testplatform.openjournals.nl/tseg/article/view/7794. Acesso em: 11 apr. 2026.