1. Adams, W. H. D. (1879). In the Far East: A narrative of exploration and adventure in Cochin-China, Cambodia, Laos and Siam. London: Thomas Nelson & Sons.
2. Asian Development Bank. (2014). Cambodia: Country poverty analysis. Mandaluyong City: Asian Development Bank.
3. Asian Development Bank. (2015). Asian development outlook 2015. Financing Asia’s future growth. Mandaluyong City: Asian Development Bank.
4. Asian Development Bank. (2017). Asian development outlook 2015. Transcending the middle income challenge. Mandaluyong City: Asian Development Bank.
5. Becker, E. (1998). When the war was over: Cambodia and the Khmer Rouge revolution. New York: Public Affairs.