Não informado. (1975). Dutch theses. Netherlands Universities Foundation for International Cooperation.
Chicago-Zitierstil (17. Ausg.)Não informado. Dutch Theses. The Hague, Holanda: Netherlands Universities Foundation for International Cooperation, 1975.
MLA-Zitierstil (8. Ausg.)Não informado. Dutch Theses. Netherlands Universities Foundation for International Cooperation, 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.