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] (dalam bahasa Korea). Ten Asia. Diakses tanggal 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"] (dalam bahasa Korea). Newsis. Diarsipkan dari versi asli tanggal March 3, 2023. Diakses tanggal March 3, 2023 – via Naver.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
web.archive.org
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"] (dalam bahasa Korea). Newsis. Diarsipkan dari versi asli tanggal March 3, 2023. Diakses tanggal March 3, 2023 – via Naver.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)