1. Ministry of Employment and Labor: Enforcement regulation of the occupational safety and health act.
http://english.kosha.or.kr/english/cmsTiles.do?url=/cms/board/board/Board.jsp?communityKey=B0488&menuId=1240&searchType=ALL&searchWord=&pageNum=1&pageSize=&boardId=29&act=VIEW
(2012). Accessed 30 April 2015
2. Korea occupational Safety & Health Agency: Technical guideline of spirometric test and interpretation.
http://www.kosha.or.kr/cms/generate/FileDownload.jsp?content_id=358431&category_id=4828&version=1.0&file_name=358431_2014_2.pdf
(2014). Accessed 30 April 2015. (Korean, translated by Kim NM).
3. The National Institute for Occupational Safety and Health (NIOSH). Spirometry.
http://www.cdc.gov/niosh/topics/spirometry/spirola.html
(2012). Accessed 11 October 2014.
4. Korean Statistical Information Service: Populaltion of registered foreigners by nationality or types of visa.
http://kosis.kr/statHtml/statHtml.do?orgId=111&tblId=DT_1B040A5&conn_path=I2
(2014). Accessed 15 October 2014. (Korean, translated by Kim NM).
5. Korea Institute for International Economic Policy. Southeast Asian Labor Migration to Korea: Origin-Country Factors and Policy Implications.
http://www.kiep.go.kr/include/filedown.jsp?fname=WEU-13-35.pdf&fpath=EngWorld&NO=58&FNO=49
(2014). Accessed 30 April 2015.