APA (7th ed.) Citation

N, E. N., & Chanseok, S. (2018). Why? People - Nelson Mandela. PT Elex Media Komputindo.

Chicago Style (17th ed.) Citation

N, Endah Nawang, and Seo Chanseok. Why? People - Nelson Mandela. PT Elex Media Komputindo, 2018.

MLA (8th ed.) Citation

N, Endah Nawang, and Seo Chanseok. Why? People - Nelson Mandela. PT Elex Media Komputindo, 2018.

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