"태연, 오늘(24일) 6시 신곡 '사계' 발표…차트 점령 예고" [Taeyeon to release new song 'Four Seasons' today (24th) at 6 PM… Chart domination expected] (in Korean). MSPL News. March 24, 2019. Archived from the original on July 6, 2024 – via Naver Post.
billboard.com
"Four Seasons". Billboard. Prometheus Global Media. Archived from the original on December 24, 2022. Retrieved December 24, 2022.
"가온 인증 – Streaming 누적사용량 인증" [Gaon Certification – Streaming Cumulative Sales Certification]. Gaon Music Chart (in Korean). Archived from the original on December 1, 2019. Retrieved November 7, 2019.
2019년 4월 6일 음악중심 차트 [Music Core Chart on April 6, 2019]. iMBC (in Korean). April 8, 2019. Archived from the original on January 8, 2025. Retrieved January 8, 2025.
"[2020 서울가요대상] 태연 '음원대상'→방탄소년단 '음반대상'…엑소, 4관왕 등극 (종합)" [[2020 Seoul Music Awards] Taeyeon wins song grand prize, BTS wins album grand prize, Exo wins 4 awards (Full list)]. OSEN (in Korean). 2020-01-30. Archived from the original on June 7, 2021. Retrieved 2021-06-06.
""국보급 음색 여신"..태연, 새 싱글에 담길 깊은 울림" ["National Treasure-level Voice Goddess"..Taeyeon, Deep Resonance to be Included in New Single]. OSEN News (in Korean). March 21, 2019. Archived from the original on July 6, 2024 – via Naver.
m.post.naver.com
"태연, 오늘(24일) 6시 신곡 '사계' 발표…차트 점령 예고" [Taeyeon to release new song 'Four Seasons' today (24th) at 6 PM… Chart domination expected] (in Korean). MSPL News. March 24, 2019. Archived from the original on July 6, 2024 – via Naver Post.
"방탄소년단X태연, 제29회 서울가요대상 앨범-음원 대상…엑소 4관왕[종합]" [BTS X Taeyeon, 29th Seoul Music Awards Album-Digital Song Grand Prize…EXO 4 Crowns [Comprehensive]]. Sports Seoul (in Korean). 30 January 2020. Archived from the original on February 1, 2020. Retrieved January 8, 2025.
topstarnews.net
Lee Jung-beom (March 18, 2019). "'믿듣탱' 태연, 새 싱글 '사계' 24일 오후 6시 전격 공개" [‘Trust and Listen’ Taeyeon, new single ‘Four Seasons’ released at 6pm on the 24th]. Top Star News (in Korean).
"가온 인증 – Streaming 누적사용량 인증" [Gaon Certification – Streaming Cumulative Sales Certification]. Gaon Music Chart (in Korean). Archived from the original on December 1, 2019. Retrieved November 7, 2019.
"방탄소년단X태연, 제29회 서울가요대상 앨범-음원 대상…엑소 4관왕[종합]" [BTS X Taeyeon, 29th Seoul Music Awards Album-Digital Song Grand Prize…EXO 4 Crowns [Comprehensive]]. Sports Seoul (in Korean). 30 January 2020. Archived from the original on February 1, 2020. Retrieved January 8, 2025.
""국보급 음색 여신"..태연, 새 싱글에 담길 깊은 울림" ["National Treasure-level Voice Goddess"..Taeyeon, Deep Resonance to be Included in New Single]. OSEN News (in Korean). March 21, 2019. Archived from the original on July 6, 2024 – via Naver.
"[2020 서울가요대상] 태연 '음원대상'→방탄소년단 '음반대상'…엑소, 4관왕 등극 (종합)" [[2020 Seoul Music Awards] Taeyeon wins song grand prize, BTS wins album grand prize, Exo wins 4 awards (Full list)]. OSEN (in Korean). 2020-01-30. Archived from the original on June 7, 2021. Retrieved 2021-06-06.
2019년 4월 6일 음악중심 차트 [Music Core Chart on April 6, 2019]. iMBC (in Korean). April 8, 2019. Archived from the original on January 8, 2025. Retrieved January 8, 2025.