World Development Indicators 9 Şubat 2018 tarihinde Wayback Machine sitesinde arşivlendi., World Bank. Retrieved 1 July 2012. Note: "PPP conversion factor, GDP (LCU per international $)" and "Official exchange rate (LCU per US$, period average)" for Switzerland were used.
World Development Indicators 9 Şubat 2018 tarihinde Wayback Machine sitesinde arşivlendi., World Bank. Retrieved 1 July 2012. Note: "PPP conversion factor, GDP (LCU per international $)" and "Official exchange rate (LCU per US$, period average)" for Switzerland were used.