APA Style

Who ? Barrack Obama. (2011). Jakarta: Gramedia.

Chicago Style

Who ? Barrack Obama. 1. Jakarta: Gramedia, 2011. .

MLA Style

Who ? Barrack Obama. 1. Jakarta: Gramedia, 2011. .

Turabian Style

Who ? Barrack Obama. Jakarta: Gramedia, 2011. .