Yeon Hwi-seon (December 16, 2019). "정우성 연출 '보호자', 김남길X박성웅→박유나 "검토 중"...드림팀 꾸릴까 [종합]" [Directed by Jung Woo-sung 'Guardian', Kim Nam-gil X Park Seong-woong → Park Yu-na "under review"... Shall we form a dream team [General]]. OSEN (dalam bahasa Korea). Diakses tanggal July 29, 2022 – via Naver.
Lim Soo-yeon (January 12, 2023). "[2023 기대작⑧] 정우성 감독 '보호자', "감독 정우성의 관점이 담긴 평범함의 딜레마"" [[2023 Anticipated Work⑧] Director Jung Woo-sung's 'Guardian', "The Dilemma of Ordinaryness with Director Jung Woo-sung's Perspective"]. Cine21 (dalam bahasa Korea). Diakses tanggal January 12, 2023.
