↑Stephen Mihm (July 23, 2006). "No Ordinary Counterfeit". The New York Times. Diarsipkan dari versi aslinya tanggal 5 September 2014. Diakses tanggal April 9, 2014.
↑Kan, Paul; Bechton, Bruce; Collins, Robert (2010). Criminal Sovereignty: Understanding North Korea's Illicit International Activities. Strategic Studies Institute. ISBN 9781584874324.: 2 
"Democratic People's Republic of Korea (DPRK or North Korea)"(PDF). International Narcotics Control Strategy Report: Drug and Chemical Control. Vol. 1. Washington: United States Department of State. 2017. hlm. 143. Diarsipkan dari asli(PDF) tanggal 2017-05-04.