2021년 01월 Album Chart [January 2021 Album Chart] (in Korean). Gaon Music Chart. Retrieved June 2, 2021.
"2021년 Album Chart". Gaon Music Chart (in Korean). Retrieved January 9, 2022.
Cumulative sales of The First Step: Treasure Effect on Gaon Chart: 308,490 (CD) + 27,361 (Kino)
2021년 1월 Album Chart [January 2021 Album Chart]. Gaon Music Chart (in Korean). Archived from the original on February 11, 2021. Retrieved February 10, 2021.
Cumulative sales of The First Step: Treasure Effect on Gaon Chart: 308,490 (CD) + 27,361 (Kino)
2021년 1월 Album Chart [January 2021 Album Chart]. Gaon Music Chart (in Korean). Archived from the original on February 11, 2021. Retrieved February 10, 2021.
Digital sales for The First Step: Treasure Effect (906):