APA Style

Seyhan, E., Subagyo, S. (1990). Dasar-Dasar Hidrologi . Yogyakarta: Gadjah Mada University Press.

MLA Style

Seyhan, Ernis., Subagyo, Sentot. "Dasar-Dasar Hidrologi". Yogyakarta: Gadjah Mada University Press, 1990. Text.