Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Khmer Rouge:

"

After returning to Cambodia in 1953, Pol Pot threw himself into party work. At first, he went to join with forces allied to the Viet Minh operating in the rural areas of Kampong Cham Province (Kompong Cham). After the end of the war, he moved to Phnom Penh under Tou Samouth's "urban committee", where he became an important point of contact between above-ground parties of the left and the underground secret communist movement.[1]