Sitthiphon Kruarattikan. (2019) Norodom Sihanouk's special relationship with North Korea: A Preliminary Survey. <i>Interdisciplinary Research Review</i>, <i>14</i>(4), 51.Sitthiphon Kruarattikan. "Norodom Sihanouk's special relationship with North Korea: A Preliminary Survey". Interdisciplinary Research Review 14 (2019):51.Sitthiphon Kruarattikan. Norodom Sihanouk's special relationship with North Korea: A Preliminary Survey. Nakhon Pathom Rajabhat University:ม.ป.ท. 2019.