Choi, Jeong-min (August 25, 2017). 펜타곤, 새 앨범 'DEMO_01' 컴백 스케줄 티저 공개. 10asia (in Korean). Korea Entertainment Media. Archived from the original on November 7, 2017. Retrieved November 2, 2017.
Choi, Jeong-min (August 25, 2017). 펜타곤, 새 앨범 'DEMO_01' 컴백 스케줄 티저 공개. 10asia (in Korean). Korea Entertainment Media. Archived from the original on November 7, 2017. Retrieved November 2, 2017.