"H. Ihwan Datu Adam, SE". Regional People's Representative Council of East Kalimantan. Archived from the original on 7 March 2013. Retrieved 8 February 2021.
"H. Ihwan Datu Adam, SE". Regional People's Representative Council of East Kalimantan. Archived from the original on 7 March 2013. Retrieved 8 February 2021.