URL: https://www.cia.gov/library/publications/the-world-factbook/geos/tx.html (дата обращения: 01.06.2020).

URL: https://www.imf.org/external/pubs/ft/weo/2019/02/weodata/weorept.aspx?pr.x=81&pr.y=15&sy=2017&ey=2021&scsm=1&ssd=1&sort=country&ds=.&br=1&c=925&s=NGDPD%2CPPPGDP%2CNGDPDPC%2CPPPPC%2CPCPIPCH&grp=0&a= (дата обращения: 01.06.2020).