Não informado. (1957). Higher education and research in the Netherlands. Netherlands Universities Foundation for International Cooperation.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Higher Education and Research in the Netherlands. The Hague, Holanda: Netherlands Universities Foundation for International Cooperation, 1957.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Higher Education and Research in the Netherlands. Netherlands Universities Foundation for International Cooperation, 1957.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.