^Nat Kretchun. A Quiet Opening: North Koreans in a Changing Media Environment(PDF). InterMedia. May 10, 2012 [May 10, 2012]. （原始内容(PDF)存档于May 12, 2012）. The primary focus of the study was on the ability of North Koreans to access outside information from foreign sources through a variety of media, communication technologies and personal sources. The relationship between information exposure on North Koreans’ perceptions of the outside world and their own country was also analyzed.
