Gaya APA

Tyas, L, A, N. (2009). Eco-friendly homestay management in Ubud area bali province . Yogyakarta: Graduate School Gadjah Mada University.

Gaya MLA

Tyas, Lintang, Ayu, Nugrahaning. "Eco-friendly homestay management in Ubud area bali province". Yogyakarta: Graduate School Gadjah Mada University, 2009. Text.