1
Published 2009
Office of the Secretary of State for Administrative Modernisation, Portugal

2
Published 2006
Principia, Publicações Universitárias e Científicas, Ldª

3
Published 2008
F-Iniciativas

4
Published 2001
OECD Publishing

5
Published 2014
Santillana, Brazil

6
Published 2016
Universidade Federal do Rio Grande do Sul