Bhutan portal Money portal Numismatics portal Royal Monetary Authority of Bhutan Economy of Bhutan , accessed 2008-11-13 Bhutan issues new 50- and 1,000-ngultrum notes BanknoteNews.com.
Бутан Економија на Бутан Индиска рупија Accessed 2008-11-13 Bhutan issues new 50- and 1,000-ngultrum notes BanknoteNews.com.