충주사과가 좋은 이유 [Why Chungju Apple is Good?]. www.chungju.go.kr (in Korean). Retrieved May 19, 2018.
충주사과 재배역사 [Chungju apple cultivation history]. www.chungju.go.kr (in Korean). Retrieved May 19, 2018.
isi.go.kr
"International School Information" 忠州華僑小學校 (in Traditional Chinese). International School Information, Government of South Korea. Retrieved March 30, 2016. 9 Gaenggogae-ro, Chungju-si, Chungcheongbuk-do, 380–950, Korea