Gaya APA

Nugraheni, Y, R., Khotimah, N. (2009). Bisikan Surga . Yogyakarta: Diva Press.

Gaya MLA

Nugraheni, Yani, Rahma., Khotimah, Nurul. "Bisikan Surga". Yogyakarta: Diva Press, 2009. Book.