Recording Industry Association of Korea chart positions:
Believe: "2004.10월 - 가요 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on June 5, 2008. Retrieved October 7, 2022.
"2004년 총결산 가요 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on August 1, 2008. Retrieved October 7, 2022.
"2006년 - 가요 총결산 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on August 1, 2008. Retrieved October 7, 2022.
"2005년 - 가요 총결산 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on August 1, 2008. Retrieved October 7, 2022.
"2007.상반기 결산 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on October 11, 2008. Retrieved October 7, 2022.
Han, Hyun-jeong (November 16, 2022). "리버스' 임원희 "카메오 토니안, 배우로서도 손색없어" ['Reverse' Lim Won-hee "Cameo Tony An, as an actor is not inferior] (in Korean). Maeil Business Star Today. Retrieved March 19, 2023 – via Naver.
Seo Ye-jin (August 10, 2021). "[공식] 토니안, '두 번째 남편' 특별출연…엄현경과 의리 지켰다→차서원과 호흡" [[Official] Tony An, special appearance on 'Second Husband'... I kept my loyalty with Uhm Hyun-kyung → Breathing with Cha Seo-won]. Ten Asia (in Korean). Naver. Retrieved August 10, 2021.
Ko Da-yeon (October 28, 2021). "형원 주연, 하이틴 뮤지컬 드라마 '다시, 플라이' 11월 공개" [Starring Hyungwon, teen musical drama 'Again, Fly' to be released in November] (in Korean). Newsis. Retrieved October 28, 2021 – via Naver.
Recording Industry Association of Korea chart positions:
Believe: "2004.10월 - 가요 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on June 5, 2008. Retrieved October 7, 2022.
"2004년 총결산 가요 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on August 1, 2008. Retrieved October 7, 2022.
"2006년 - 가요 총결산 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on August 1, 2008. Retrieved October 7, 2022.
"2005년 - 가요 총결산 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on August 1, 2008. Retrieved October 7, 2022.
"2007.상반기 결산 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on October 11, 2008. Retrieved October 7, 2022.