1. Times Atlas of World History,2000
2. 2014 Revision of the World Urbanization Prospectshttp://www.un.org/en/development/desa/publications/2014-revision-world-urbanization-prospects.html
3. South-East Asia Migrant Crisis: Numbers Are Now “Alarming”, Talks Toldhttp://www.theguardian.com/world/2015/may/29/south-east-asia-migrant-crisis-numbers-are-now-alarming-talks-told
4. Refugee Workers in the Indochina Exodus, 1975–1982;Thompson,2010