APA Style

Ong, Daniel. (2003). The Power of Focus (-). Yogyakarta: Andi Ofset.

Chicago Style

Ong, Daniel. The Power of Focus. - Yogyakarta: Andi Ofset, 2003. Textbook.

MLA Style

Ong, Daniel. The Power of Focus. - Yogyakarta: Andi Ofset, 2003. Textbook.

Turabian Style

Ong, Daniel. The Power of Focus. - Yogyakarta: Andi Ofset, 2003. Textbook.