APA (7th ed.) Citation

Chŏng, Y., & Kim, C. (2020). Seven years of darkness. Penguin Books.

Chicago Style (17th ed.) Citation

Chŏng, Yu-jŏng, and Chi-Young Kim. Seven Years of Darkness. [New York]: Penguin Books, 2020.

MLA (8th ed.) Citation

Chŏng, Yu-jŏng, and Chi-Young Kim. Seven Years of Darkness. Penguin Books, 2020.

Warning: These citations may not always be 100% accurate.