Yoon So-won (April 29, 2016). "여자친구, 여름 시즌송 UN '파도' 리메이크…MV 티저 오픈" [GFriend, Summer season song UN 'Wave' remake..MV teaser open]. TV Daily (in Korean). Archived from the original on August 3, 2017. Retrieved February 6, 2017.
Yoon So-won (April 29, 2016). "여자친구, 여름 시즌송 UN '파도' 리메이크…MV 티저 오픈" [GFriend, Summer season song UN 'Wave' remake..MV teaser open]. TV Daily (in Korean). Archived from the original on August 3, 2017. Retrieved February 6, 2017.