Kim So-yeon (February 9, 2021). "'오케이 광자매' 홍은희·전혜빈·고원희, 문영남 신화 스타트" ['Okay photo sisters' Hong Eun-hee, Jeon Hye-bin, Ko Won-hee, and Moon Young-nam Shinhwa start]. Hankyung (به کرهای). Archived from the original on March 8, 2021. Retrieved February 21, 2021.
Kim Gun-woo (January 6, 2021). "초록뱀, '펜트하우스'부터 BTS·김수현 신작까지 "사상 최대 매출 노린다" - 머니투데이" [Green Snake, from 'Penthouse' to BTS and Kim Soo-hyun's new work, "Aiming for the highest sales ever"]. Money Today (به کرهای). Retrieved July 6, 2021.[پیوند مرده]
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Ahn Tae-Hyun (February 24, 2021). "'오케이 광자매' 윤주상→홍은희, 요절복통 '대환장' 가족의 탄생" ['Okay photon sister' Yun Joo-sang → Hong Eun-hee, birth of a family of'Great Hwan-jang']. News1 (به کرهای). Archived from the original on March 8, 2021. Retrieved February 24, 2021.
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Lim Soo-bin (February 9, 2021). "KBS2 새 주말극 '오케이 광자매' 희로애락 인생사 담긴 1차 티저 공개" [KBS2's new weekend play'Okay Photo Sisters' 1st teaser that contains the joys, sorrows, and life history]. Seoul Economic Daily (به کرهای). Archived from the original on July 9, 2023. Retrieved February 21, 2021.
Ahn Tae-Hyun (February 24, 2021). "'오케이 광자매' 윤주상→홍은희, 요절복통 '대환장' 가족의 탄생" ['Okay photon sister' Yun Joo-sang → Hong Eun-hee, birth of a family of'Great Hwan-jang']. News1 (به کرهای). Archived from the original on March 8, 2021. Retrieved February 24, 2021.
Kim So-yeon (February 9, 2021). "'오케이 광자매' 홍은희·전혜빈·고원희, 문영남 신화 스타트" ['Okay photo sisters' Hong Eun-hee, Jeon Hye-bin, Ko Won-hee, and Moon Young-nam Shinhwa start]. Hankyung (به کرهای). Archived from the original on March 8, 2021. Retrieved February 21, 2021.
Lim Soo-bin (February 9, 2021). "KBS2 새 주말극 '오케이 광자매' 희로애락 인생사 담긴 1차 티저 공개" [KBS2's new weekend play'Okay Photo Sisters' 1st teaser that contains the joys, sorrows, and life history]. Seoul Economic Daily (به کرهای). Archived from the original on July 9, 2023. Retrieved February 21, 2021.
