Pick, Albert (1994). Standard Catalog of World Paper Money: General Issues. Colin R. Bruce II and Neil Shafer (editors) (7th ed.). Krause Publications. ISBN0-87341-207-9.
"Currency Codes" (به انگلیسی). Oanda Corporation. Retrieved 3 May 2013.
"Currencies of the World" (به انگلیسی). University of British Columbia. May 1 2008. Archived from the original on 29 November 2011. Retrieved 3 May 2013. {{cite web}}: Check date values in: |تاریخ= (help)
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