{. Drexel, {. Nuber, and {. Behr. Forschungsberichte aus dem Institut für Sozialwissenschaftliche Forschung e.V., München Aspekte-Verl., Frankfurt am Main, (1976)
{. Djafari, {. Borsdorf, and {. Lippegaus (Eds.) Berichte und Materialien / INBAS, Institut für Berufliche Bildung, Arbeitsmarkt- und Sozialpolitik INBAS, Frankfurt am Main, (2007)
{. Stern, {. Descy, and {. Tessaring (Eds.) Report on vocational training research in Europe Off. for Off. Publ. of the Europ. Communities, Luxembourg, (2004)
{. Coles, {. Descy, and {. Tessaring (Eds.) Report on vocational training research in Europe Off. for Off. Publ. of the Europ. Communities, Luxembourg, (2004)