[1] History of Ancient India: Earliest Times to 1000 A. D. By Radhey Shyam Chaurasia p. 38:"the Kernel of the Ramayana was composed before 500 B.C. while the more recent portion were not probably added till the 2nd century B.C. and later."
"Census of Population 2010"(PDF). Singapore Department of Statistics. Diarkibkan daripada yang asal(PDF) pada 16 October 2016. Dicapai pada 4 February 2018.
"Census of Population 2010"(PDF). Singapore Department of Statistics. Diarkibkan daripada yang asal(PDF) pada 16 October 2016. Dicapai pada 4 February 2018.