"Global Peace Index 2019"(PDF). visionofhumanity.org. Institute for Economics and Peace. Archived from the original(PDF) on 27 August 2019. Retrieved 16 July 2021.
"Global Peace Index 2018"(PDF). visionofhumanity.org. Institute for Economics and Peace. Archived from the original(PDF) on 29 April 2019. Retrieved 16 July 2021.
"Global Peace Index 2018"(PDF). visionofhumanity.org. Institute for Economics and Peace. Archived from the original(PDF) on 29 April 2019. Retrieved 16 July 2021.
Institute for Economics and Peace (2014). "Global Peace Index 2014"(PDF). Visionofhumanity.org. Archived from the original(PDF) on 8 July 2017. Retrieved 16 July 2021.
"Global Peace Index 2019"(PDF). visionofhumanity.org. Institute for Economics and Peace. Archived from the original(PDF) on 27 August 2019. Retrieved 16 July 2021.
"Global Peace Index 2018"(PDF). visionofhumanity.org. Institute for Economics and Peace. Archived from the original(PDF) on 29 April 2019. Retrieved 16 July 2021.
"Global Peace Index 2018"(PDF). visionofhumanity.org. Institute for Economics and Peace. Archived from the original(PDF) on 29 April 2019. Retrieved 16 July 2021.
Institute for Economics and Peace (2014). "Global Peace Index 2014"(PDF). Visionofhumanity.org. Archived from the original(PDF) on 8 July 2017. Retrieved 16 July 2021.