<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/03/27/130327085423_yuan_notes_304x171_v_nocredit.jpg>
<http://www.bbc.com/indonesia/majalah/2013/04/130410_bisnis_cina_australia_mata_uang.shtml>