1
Published 2007
Ministry of Employment and Labour, Hungary

2
Published 2009
National Office for Research and Technology

3
Published 2001
OECD Publishing

4
Published 2008
Ministry of Environment and Water, Hungary

5
Published 2009
Tempus Public Foundation

6
by Gardner, Robert
Published 1993
Documentary Educational Resources (DER)

7
by Liszt, Franz
Published 1936
Breitkopf and Härtel

8
by Pauly, Károly
Published 1817
typis Grundianis

9
by Mandelló, Gyula
Published 1895
Kilián frigyes

10
by Bamberger, Béla
Published 1890
Révai Testvérek Kiadása

11
Published 2008
Ministry of Education and Culture, Hungary

12
Published 2004
OECD Publishing

13
Published 2009
Institute for Legal Studies of the Hungarian Academy of Sciences

14
Published 2006
Hungarian Institute for Educational Research and Development

16
Published 1854
Wallishausser J.B. sajátja

17
Published 2012
Training Center of the Hungarian Chamber of Auditors

18
by Hénard, Fabrice
Published 2012
ELTE University of Science, Faculty of Social Sciences

19
Published 2012
Hungarian Institute for Educational Research and Development

20
Published 2011
Hungarian Institute for Educational Research and Development