APA Style

Who ? Oprah Winfrey. (2011). Jakarta: Gramedia.

Chicago Style

Who ? Oprah Winfrey. 1. Jakarta: Gramedia, 2011. .

MLA Style

Who ? Oprah Winfrey. 1. Jakarta: Gramedia, 2011. .

Turabian Style

Who ? Oprah Winfrey. Jakarta: Gramedia, 2011. .