Gaya APA

Goenawan, S. (2015). A Challenge to Change : A Book for You to Learn How to Build Your Life Better and Live With It (1). Yogyakarta: ANDI.

Gaya MLA

Goenawan, Sariwati. "A Challenge to Change : A Book for You to Learn How to Build Your Life Better and Live With It". 1 Yogyakarta: ANDI, 2015. Filsafat.