APA (7th ed.) Citation

U, T., & Mun, C. y. (2015). Why? Munhak chakp'um (1-p'an.). Yerimdang.

Chicago Style (17th ed.) Citation

U, Tŏk-hwan, and Cheol yeong Mun. Why? Munhak Chakp'um. 1-p'an. Sŏul: Yerimdang, 2015.

MLA (9th ed.) Citation

U, Tŏk-hwan, and Cheol yeong Mun. Why? Munhak Chakp'um. 1-p'an. Yerimdang, 2015.