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Collegium Invisibile Collegium Civitas Collegium Novum Collegium Nobilium (Warszawa)Tài liệu tham khảo
WikiPedia: Collegium Invisibile http://213.180.130.202/4870,4958,1477425,1,czasopi... http://www.ci.edu.pl http://www.ci.edu.pl/index.php?id=historia&kat=Sto... http://www.ci.edu.pl/index.php?id=tutorzy&kat=Czlo... http://wiadomosci.gazeta.pl/Wiadomosci/1,80269,321... http://www.pedagogika.umk.pl/zjazd-pedagogiczny/do... https://web.archive.org/web/20110807200017/http://... https://web.archive.org/web/20120323055319/http://... https://web.archive.org/web/20131105165122/http://...