Pesti, Cerlin; Randma-Liiv, Tiina (April 2018). 〈Estonia〉. Thijs, Nick; Hammerschmid, Gerhard. 《Public administration characteristics and performance in EU28》. 룩셈부르크: Publications Office of the European Union. 252–255쪽. doi:10.2767/74735. ISBN9789279904530. 2020년 1월 18일에 확인함.
europa.eu
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Pesti, Cerlin; Randma-Liiv, Tiina (April 2018). 〈Estonia〉. Thijs, Nick; Hammerschmid, Gerhard. 《Public administration characteristics and performance in EU28》. 룩셈부르크: Publications Office of the European Union. 252–255쪽. doi:10.2767/74735. ISBN9789279904530. 2020년 1월 18일에 확인함.