APA (7th ed.) Citation

Yoo, G. (2017). Why? United Kingdom. Elex Media Komputindo.

Chicago Style (17th ed.) Citation

Yoo, Giyeong. Why? United Kingdom. Elex Media Komputindo, 2017.

MLA (8th ed.) Citation

Yoo, Giyeong. Why? United Kingdom. Elex Media Komputindo, 2017.

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