Yoon, Jun-ho (February 14, 2023). "유주(YUJU), 3월 7일 컴백...14개월 만에 새 앨범" [YUJU, comeback on March 7th...New album in 14 months] (in Korean). Ten Asia. Retrieved March 3, 2023 – via Naver.
Jeong, Ji-na (February 16, 2023). "유주, 신보 'O' 티저 공개..."긴 여정, 새로운 변화"" [Yuju unveils new album 'O' teaser..."A long journey, a new change"] (in Korean). Newsis. Archived from the original on March 3, 2023. Retrieved March 3, 2023 – via Naver.
Im, Min-ji (February 27, 2023). "유주, 새 앨범 트랙리스트 공개..타이틀곡은 'Without U'(공식)" [Yuju unveils new album track list..The title song is 'Without U' (official)] (in Korean). Herald Pop. Archived from the original on March 3, 2023. Retrieved March 3, 2023 – via Naver.
Kim, Bo-ra (March 1, 2023). "'O' 유주 "이번 앨범은 저의 작은 여행기"" ['O' Yuju "This album is my little travelogue"] (in Korean). Osen. Archived from the original on March 1, 2023. Retrieved March 3, 2023 – via Naver.
Kim, Do-gon (March 3, 2023). "유주 'Without U', 깊어진 감성의 끝" [Yuju 'Without U', the end of deeper emotions] (in Korean). Sports Kyunghyang. Archived from the original on March 3, 2023. Retrieved March 3, 2023 – via Naver.
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Jeong, Ji-na (February 16, 2023). "유주, 신보 'O' 티저 공개..."긴 여정, 새로운 변화"" [Yuju unveils new album 'O' teaser..."A long journey, a new change"] (in Korean). Newsis. Archived from the original on March 3, 2023. Retrieved March 3, 2023 – via Naver.
Im, Min-ji (February 27, 2023). "유주, 새 앨범 트랙리스트 공개..타이틀곡은 'Without U'(공식)" [Yuju unveils new album track list..The title song is 'Without U' (official)] (in Korean). Herald Pop. Archived from the original on March 3, 2023. Retrieved March 3, 2023 – via Naver.
Kim, Bo-ra (March 1, 2023). "'O' 유주 "이번 앨범은 저의 작은 여행기"" ['O' Yuju "This album is my little travelogue"] (in Korean). Osen. Archived from the original on March 1, 2023. Retrieved March 3, 2023 – via Naver.
Kim, Do-gon (March 3, 2023). "유주 'Without U', 깊어진 감성의 끝" [Yuju 'Without U', the end of deeper emotions] (in Korean). Sports Kyunghyang. Archived from the original on March 3, 2023. Retrieved March 3, 2023 – via Naver.