1. Achato, L., Eaton, M., & Jones, C. (2010). The migrant journey (UK Home Office Research Report No. 43). Retrieved February 3, 2013, from http://webarchive.nationalarchives.gov.uk/20110218135832/http://rds.homeoffice.gov.uk/rds/pdfs10/horr43c.pdf
2. Ahmad, Y. (2002, June 16). Sleepless in Singapore. Malaysian Business. Retrieved June 23, 2011, from http://findarticles.com/p/articles/mi_qn6207/is_20020616/ai_n24905252/
3. Appudurai, J., & Lian, K. F. (2015). Social change in an urban neighbourhood in Klang: A case study. Petaling Jaya: Strategic Information and Research Development Centre.
4. Bedi, R. S., & Azizan, H. (2010, April 25). Drawing the experts home. The Star. Retrieved June 27, 2011, from http://thestar.com.my/news/story.asp?file=/2010/4/25/nation/5848533&sec=nation
5. Beine, M., Docquier, F., & Rapoport, H. (2006). Measuring international skilled migration: New estimates controlling for age of entry. (World Bank Research Report). Washington DC: The World Bank. Retrieved April 12, 2012, from http://go.worldbank.org/T9ZN8YS1V0