, S., & , D. D. A. (2010). American foreign policy under president George W. Bush and Barack Obama: From hard power to soft power. [Yogyakarta] : Universitas Gadjah Mada.
Chicago Style Citation, SETYOWATI, and Drs. Dafri Agussalim. American Foreign Policy Under President George W. Bush and Barack Obama: From Hard Power to Soft Power. [Yogyakarta] : Universitas Gadjah Mada, 2010.
MLA引文, SETYOWATI, and Drs. Dafri Agussalim. American Foreign Policy Under President George W. Bush and Barack Obama: From Hard Power to Soft Power. [Yogyakarta] : Universitas Gadjah Mada, 2010.
警告：這些引文格式不一定是100％准確.