2
Published 2018
OECD Publishing

4
Published 2008
Ministry of Economy, Poland

5
Published 2007
Ministry of Economy, Poland

6
Published 2011
Wolters Kluwer Polska Sp. z o.o., Poland

7
Published 2007
Ministry of Economy, Poland

8
Published 2007
Statistics Poland

14
Published 2012
Ministry of Economy, Poland

18
Published 2014
Ministry of Economy, Poland

19
Published 2015
OECD Publishing

20
Published 2015
Ministry of Labour and Social Policy, Poland