APA (7th ed.) Citation

Ahn, H. (2011). Who? Barack Obama. Gramedia.

Chicago Style (17th ed.) Citation

Ahn, Hyeong-mo. Who? Barack Obama. Gramedia, 2011.

MLA (8th ed.) Citation

Ahn, Hyeong-mo. Who? Barack Obama. Gramedia, 2011.

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