Kim, Hwi-seon (November 7, 2017). [★포토]몬스타엑스, 'THE CODE'로 컴백 [[Photo] MONSTA X, comeback with 'THE CODE']. Star News (in Korean). Retrieved November 7, 2017 – via Naver.
週間 CDアルバムランキング - 2017年11月06日~2017年11月12日 [Weekly CD Album Ranking from November 6, 2017 to November 12, 2017]. Oricon News (in Japanese). Oricon. Archived from the original on November 15, 2017. Retrieved November 15, 2017.
Kim, Eun-ji (March 12, 2018). '컴백' 몬스타엑스(MONSTA X), 개별 티저 이미지 공개…기대감 ↑ ['Comeback' MONSTA X releases individual teaser images... anticipation ↑]. Top Star News (in Korean). Retrieved March 12, 2018 – via Naver.
週間 CDアルバムランキング - 2017年11月06日~2017年11月12日 [Weekly CD Album Ranking from November 6, 2017 to November 12, 2017]. Oricon News (in Japanese). Oricon. Archived from the original on November 15, 2017. Retrieved November 15, 2017.