"2012년 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on May 18, 2015. Retrieved December 21, 2016.
Digital sales for A Year Ago:
"2013년 01월 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on January 29, 2021. Retrieved December 21, 2016.
Digital sales for Short Hair:
"2013년 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on June 25, 2019. Retrieved December 21, 2016.
Digital sales for Break Up to Make Up:
"2014년 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on March 4, 2016. Retrieved December 21, 2016.
Digital sales for Photograph:
"2015년 06월 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on December 20, 2016. Retrieved December 21, 2016.
Digital sales for Ocean:
"2016년 07월 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on November 24, 2016. Retrieved December 21, 2016.
Digital sales for #Begin Again:
"2016년 36주차 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on December 21, 2016. Retrieved December 21, 2016.
Digital sales for Oasis:
"2017년 31주차 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. August 10, 2017. Archived from the original on September 22, 2017. Retrieved August 10, 2017.
Kwak, Hyeon-su (September 17, 2021). "플레이엠·크래커 엔터 통합…에이핑크·더보이즈 한 식구 된다" [PlayM and Creker Enter integration… Apink and The Boyz become one family]. YTN (in Korean). Archived from the original on February 25, 2022. Retrieved September 17, 2021 – via Naver.
Kim Ye-ji (November 12, 2021). "에이핑크 '플레이엠'·더보이즈 '크래커', IST로 통합" [Apink's 'PlayM' and The Boyz's 'Creker' merged into IST] (in Korean). Newsis. Archived from the original on November 12, 2021. Retrieved November 12, 2021 – via Naver.
Jeong Bit (May 9, 2022). "[공식]IST엔터, 新보이그룹 ABO 론칭…'디 오리진'으로 뽑힌 7人, 하반기 데뷔" [[Official] IST Entertainment launches new boy group ABO... 7 people selected as 'The Origin' to debut in the second half of the year] (in Korean). Sports Chosun. Retrieved May 9, 2022 – via Naver.
Kim No-eul (February 7, 2022). "에이핑크·더보이즈 소속사, 올 상반기 새 보이그룹 론칭 [공식입장]" [Apink and The Boyz agency launch a new boy group in the first half of this year [Official position]] (in Korean). Xports News. Archived from the original on February 7, 2022. Retrieved February 7, 2022 – via Naver.
Kim, Hyun-sik (October 22, 2021). "김채현 1위…'걸스플래닛' 9인조 걸그룹 '케플러' 결성". Edaily (in Korean). Archived from the original on October 22, 2021. Retrieved October 22, 2021.
Kwak, Hyeon-su (September 17, 2021). "플레이엠·크래커 엔터 통합…에이핑크·더보이즈 한 식구 된다" [PlayM and Creker Enter integration… Apink and The Boyz become one family]. YTN (in Korean). Archived from the original on February 25, 2022. Retrieved September 17, 2021 – via Naver.
Kim Ye-ji (November 12, 2021). "에이핑크 '플레이엠'·더보이즈 '크래커', IST로 통합" [Apink's 'PlayM' and The Boyz's 'Creker' merged into IST] (in Korean). Newsis. Archived from the original on November 12, 2021. Retrieved November 12, 2021 – via Naver.
Kim No-eul (February 7, 2022). "에이핑크·더보이즈 소속사, 올 상반기 새 보이그룹 론칭 [공식입장]" [Apink and The Boyz agency launch a new boy group in the first half of this year [Official position]] (in Korean). Xports News. Archived from the original on February 7, 2022. Retrieved February 7, 2022 – via Naver.
Kim, Hyun-sik (October 22, 2021). "김채현 1위…'걸스플래닛' 9인조 걸그룹 '케플러' 결성". Edaily (in Korean). Archived from the original on October 22, 2021. Retrieved October 22, 2021.
Seoyeon, Ban (January 15, 2021). 김소현, 이앤티스토리와 전속계약 만료 "앞날 응원"(공식) [Kim So-Hyun and E&T Story and Exclusive Contract Expiration "Support for the Future" (Official)]. YTN Star. Archived from the original on January 21, 2021. Retrieved January 16, 2021.
"History (band)" (in Korean). Ten Asia. Archived from the original on May 15, 2017. Retrieved May 12, 2017.
Digital sales for Love Day:
"2012년 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on May 18, 2015. Retrieved December 21, 2016.
Digital sales for A Year Ago:
"2013년 01월 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on January 29, 2021. Retrieved December 21, 2016.
Digital sales for Short Hair:
"2013년 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on June 25, 2019. Retrieved December 21, 2016.
Digital sales for Break Up to Make Up:
"2014년 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on March 4, 2016. Retrieved December 21, 2016.
Digital sales for Photograph:
"2015년 06월 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on December 20, 2016. Retrieved December 21, 2016.
Digital sales for Ocean:
"2016년 07월 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on November 24, 2016. Retrieved December 21, 2016.
Digital sales for #Begin Again:
"2016년 36주차 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. December 21, 2016. Archived from the original on December 21, 2016. Retrieved December 21, 2016.
Digital sales for Oasis:
"2017년 31주차 Download Chart". Gaon Chart (in Korean). Korea Music Content Industry Association. August 10, 2017. Archived from the original on September 22, 2017. Retrieved August 10, 2017.
Seoyeon, Ban (January 15, 2021). 김소현, 이앤티스토리와 전속계약 만료 "앞날 응원"(공식) [Kim So-Hyun and E&T Story and Exclusive Contract Expiration "Support for the Future" (Official)]. YTN Star. Archived from the original on January 21, 2021. Retrieved January 16, 2021.