2018 [1] "CIA - The World Factbook GDP Country Comparison (Per Capita PPP)". Waxaa laga kaydiyay the original 2013-04-24. Soo qaatay 2018-07-20.  Barameter aan la aqoon |ciwaan= ignored (caawin) "CIA - The World Factbook GDP Country Comparison (PPP)". Waxaa laga kaydiyay the original 2011-06-04. Soo qaatay 2018-07-20.  Barameter aan la aqoon |ciwaan= ignored (caawin)