- Author: Cho Young-mee, Lee Hyo Sang, Schulz Carol, Sohn Ho-min, Sohn Sung-ock
- Language: English
- Year: 2015
- Author: Shaoming He Chang-Hun Lee Hyo-Sang Shin
- Language: English
- Year: 2020
- Author: Cho Sungdai Lee Hyo Sang Wang Hye-Sook.
- Language: Korean-English