Jeon Hyo-jin (19 Apr 2021). "큐브 신인 라잇썸, 멤버 주현X상아 프로필 공개" [Cube rookie Lightsome, member Joohyun X Sanga profile revealed] (بالكورية). Sports Donga. Archived from the original on 2021-04-19. Retrieved 2021-05-27 – via Naver.
Ji Min-kyung (20 Apr 2021). "큐브 新걸그룹 라잇썸, 두 번째 프로필 공개..'프듀48' 한초원 멤버 확정 [공식]" [Cube's new girl group Lightsome reveals second profile ... 'Produce 48' Han Chowon member confirmed [Official]] (بالكورية). Osen. Archived from the original on 2021-04-20. Retrieved 2021-05-27 – via Naver.
Lee Sun-myeong (21 Apr 2021). "큐브 엔터 새 그룹 '라잇썸' 나영·휘연, 얼굴 공개" [Cube Entertainment's new group 'Lightsum' Nayoung and Hwiyeon reveal their faces] (بالكورية). Sports Kyunghyang. Archived from the original on 2021-04-21. Retrieved 2021-05-27 – via Naver.
Baek Ji-eun (22 Apr 2021). "[공식] '큐브 新 걸그룹' 라잇썸, '프듀48' 유정-히나 공개" [[Official] 'Cube's new girl group' Lightsum, 'Produce 48' Yoojung-Hina revealed] (بالكورية). Sports Chosun. Archived from the original on 2021-04-23. Retrieved 2021-05-27 – via Naver.
web.archive.org
Jeon Hyo-jin (19 Apr 2021). "큐브 신인 라잇썸, 멤버 주현X상아 프로필 공개" [Cube rookie Lightsome, member Joohyun X Sanga profile revealed] (بالكورية). Sports Donga. Archived from the original on 2021-04-19. Retrieved 2021-05-27 – via Naver.
Ji Min-kyung (20 Apr 2021). "큐브 新걸그룹 라잇썸, 두 번째 프로필 공개..'프듀48' 한초원 멤버 확정 [공식]" [Cube's new girl group Lightsome reveals second profile ... 'Produce 48' Han Chowon member confirmed [Official]] (بالكورية). Osen. Archived from the original on 2021-04-20. Retrieved 2021-05-27 – via Naver.
Lee Sun-myeong (21 Apr 2021). "큐브 엔터 새 그룹 '라잇썸' 나영·휘연, 얼굴 공개" [Cube Entertainment's new group 'Lightsum' Nayoung and Hwiyeon reveal their faces] (بالكورية). Sports Kyunghyang. Archived from the original on 2021-04-21. Retrieved 2021-05-27 – via Naver.
Baek Ji-eun (22 Apr 2021). "[공식] '큐브 新 걸그룹' 라잇썸, '프듀48' 유정-히나 공개" [[Official] 'Cube's new girl group' Lightsum, 'Produce 48' Yoojung-Hina revealed] (بالكورية). Sports Chosun. Archived from the original on 2021-04-23. Retrieved 2021-05-27 – via Naver.
