Hwang, Su-yeon (2 Nov 2021). "'붉은 단심' 이준X강한나X장혁, 출연 확정...내년 상반기 방영 [공식입장]" ['Red Single Heart' Lee Jun X Kang Han-na X Jang Hyuk confirmed to appear...Aired in the first half of next year [Official position]] (بالكورية). Xports News. Archived from the original on 2022-02-04. Retrieved 2022-02-04 – via Naver.
Ha, Kyung-heon (5 Jan 2022). "박지빈, KBS2 '붉은 단심' 주인공 과거 역으로 깜짝 특별출연" [Park Ji-bin makes a surprise special appearance as the main character in KBS2's 'Red Single Heart'] (بالكورية). Sports Kyunghyang. Archived from the original on 2022-01-05. Retrieved 2022-01-05 – via Naver.
Moon Ji-yeon (11 Mar 2022). "[공식] 신은수, '붉은 단심' 특별출연..강한나 어린시절 변신" [[Official] Shin Eun-soo, 'Red Single Heart' Special Appearance... Kang Han-na's Childhood Transformation] (بالكورية). Sports Chosun. Archived from the original on 2022-03-13. Retrieved 2022-03-11 – via Naver.
Jo, Min-jung (5 Nov 2021). "박지연, '붉은 단심' 출연 확정...장혁과 '정적'" [Park Ji-yeon confirmed to appear in 'Red Single Heart'...Jang Hyuk and 'Static'] (بالكورية). Newsis. Archived from the original on 2021-12-04. Retrieved 2021-12-04 – via Naver.
Kang, Nae-ri (3 Nov 2021). "윤서아 '붉은 단심' 캐스팅...장르초월 라이징 스타 반열 우뚝" [Yoon Seo-ah cast for 'Red Single Heart'...A rising star that transcends genres] (بالكورية). YTN. Archived from the original on 2021-12-04. Retrieved 2021-12-04 – via Naver.
Kim, Soo-jin (11 Nov 2021). "차순배, KBS 새 월화드라마 '붉은 단심' 합류 [공식]" [Cha Soon-bae joins KBS' new Monday-Tuesday drama 'Red Single Heart' [Official]] (بالكورية). MT Star News. Archived from the original on 2021-11-28. Retrieved 2022-02-04 – via Naver.
Han, Seon-han (15 Nov 2021). "허성태, '붉은 단심' 출연..'조선 최고 딸바보' 변신[공식]" [Heo Seong-tae, appearing in 'Red Single Heart'..Transformed into 'Chosun's Best Daughter Fool' [Official]] (بالكورية). MT Star News. Archived from the original on 2022-02-04. Retrieved 2022-02-04 – via Naver.
Jo, Min-jung (23 Nov 2021). "박성연, 사극 '붉은 단심' 캐스팅...훈육상궁 역" [Park Seong-yeon, cast in the historical drama 'Red Single Heart'...Discipline Sanggung Station] (بالكورية). Newsis. Archived from the original on 2022-02-04. Retrieved 2022-02-04 – via Naver.
Jang, Woo-young (26 Jan 2022). "[단독] 오승훈, '붉은 단심' 출연 확정...이준·강한나와 호흡" [[Exclusive] Oh Seung-hoon confirmed to appear in 'Red Single Heart'...Breathing with Lee Joon and Kang Han-na] (بالكورية). OSEN. Archived from the original on 2022-01-26. Retrieved 2022-01-26 – via Naver.
Ahn Byung-gil (18 Feb 2022). "이창직 '붉은 단심' 출연 확정[공식]" [Lee Chang-jik confirmed to appear in 'Red Single Heart' [Official]] (بالكورية). Sports Kyunghyang. Archived from the original on 2022-02-18. Retrieved 2022-02-18 – via Naver.
Lee Min-ji (1 Mar 2022). "'붉은 단심' 이태리 출연확정, 장혁과 부자 호흡[공식]" ['Red Single Heart' Lee Tae-ri appearance confirmed, Jang Hyuk and the rich man [Official]] (بالكورية). Newsen. Archived from the original on 2022-03-01. Retrieved 2022-03-01 – via Naver.
Choi Na-young (17 Mar 2022). "'붉은 단심' 이준X강한나X장혁, 대본리딩 메이킹 공개..조선판 로맨스 정치사극 기대감" ['Red Single Heart' Lee Joon X Kang Han-na X Jang Hyuk, script reading making revealed] (بالكورية). OSEN. Archived from the original on 2022-03-17. Retrieved 2022-03-17 – via Naver.
Hwang, Su-yeon (2 Nov 2021). "'붉은 단심' 이준X강한나X장혁, 출연 확정...내년 상반기 방영 [공식입장]" ['Red Single Heart' Lee Jun X Kang Han-na X Jang Hyuk confirmed to appear...Aired in the first half of next year [Official position]] (بالكورية). Xports News. Archived from the original on 2022-02-04. Retrieved 2022-02-04 – via Naver.
Ha, Kyung-heon (5 Jan 2022). "박지빈, KBS2 '붉은 단심' 주인공 과거 역으로 깜짝 특별출연" [Park Ji-bin makes a surprise special appearance as the main character in KBS2's 'Red Single Heart'] (بالكورية). Sports Kyunghyang. Archived from the original on 2022-01-05. Retrieved 2022-01-05 – via Naver.
Moon Ji-yeon (11 Mar 2022). "[공식] 신은수, '붉은 단심' 특별출연..강한나 어린시절 변신" [[Official] Shin Eun-soo, 'Red Single Heart' Special Appearance... Kang Han-na's Childhood Transformation] (بالكورية). Sports Chosun. Archived from the original on 2022-03-13. Retrieved 2022-03-11 – via Naver.
Jo, Min-jung (5 Nov 2021). "박지연, '붉은 단심' 출연 확정...장혁과 '정적'" [Park Ji-yeon confirmed to appear in 'Red Single Heart'...Jang Hyuk and 'Static'] (بالكورية). Newsis. Archived from the original on 2021-12-04. Retrieved 2021-12-04 – via Naver.
Kang, Nae-ri (3 Nov 2021). "윤서아 '붉은 단심' 캐스팅...장르초월 라이징 스타 반열 우뚝" [Yoon Seo-ah cast for 'Red Single Heart'...A rising star that transcends genres] (بالكورية). YTN. Archived from the original on 2021-12-04. Retrieved 2021-12-04 – via Naver.
Kim, Soo-jin (11 Nov 2021). "차순배, KBS 새 월화드라마 '붉은 단심' 합류 [공식]" [Cha Soon-bae joins KBS' new Monday-Tuesday drama 'Red Single Heart' [Official]] (بالكورية). MT Star News. Archived from the original on 2021-11-28. Retrieved 2022-02-04 – via Naver.
Han, Seon-han (15 Nov 2021). "허성태, '붉은 단심' 출연..'조선 최고 딸바보' 변신[공식]" [Heo Seong-tae, appearing in 'Red Single Heart'..Transformed into 'Chosun's Best Daughter Fool' [Official]] (بالكورية). MT Star News. Archived from the original on 2022-02-04. Retrieved 2022-02-04 – via Naver.
Jo, Min-jung (23 Nov 2021). "박성연, 사극 '붉은 단심' 캐스팅...훈육상궁 역" [Park Seong-yeon, cast in the historical drama 'Red Single Heart'...Discipline Sanggung Station] (بالكورية). Newsis. Archived from the original on 2022-02-04. Retrieved 2022-02-04 – via Naver.
Jang, Woo-young (26 Jan 2022). "[단독] 오승훈, '붉은 단심' 출연 확정...이준·강한나와 호흡" [[Exclusive] Oh Seung-hoon confirmed to appear in 'Red Single Heart'...Breathing with Lee Joon and Kang Han-na] (بالكورية). OSEN. Archived from the original on 2022-01-26. Retrieved 2022-01-26 – via Naver.
Ahn Byung-gil (18 Feb 2022). "이창직 '붉은 단심' 출연 확정[공식]" [Lee Chang-jik confirmed to appear in 'Red Single Heart' [Official]] (بالكورية). Sports Kyunghyang. Archived from the original on 2022-02-18. Retrieved 2022-02-18 – via Naver.
Lee Min-ji (1 Mar 2022). "'붉은 단심' 이태리 출연확정, 장혁과 부자 호흡[공식]" ['Red Single Heart' Lee Tae-ri appearance confirmed, Jang Hyuk and the rich man [Official]] (بالكورية). Newsen. Archived from the original on 2022-03-01. Retrieved 2022-03-01 – via Naver.
Choi Na-young (17 Mar 2022). "'붉은 단심' 이준X강한나X장혁, 대본리딩 메이킹 공개..조선판 로맨스 정치사극 기대감" ['Red Single Heart' Lee Joon X Kang Han-na X Jang Hyuk, script reading making revealed] (بالكورية). OSEN. Archived from the original on 2022-03-17. Retrieved 2022-03-17 – via Naver.
