Gaya APA

Purbawinata, M, A. et al (1995). Characteristic of A Rain-Triggered Lahar in Boyong River, Merapi Volcano, Indonesia on 19 February 1995 . Yogyakarta: Volcanological Survey of Indonesia.

Gaya MLA

Purbawinata, Mas, Atje. et al. "Characteristic of A Rain-Triggered Lahar in Boyong River, Merapi Volcano, Indonesia on 19 February 1995". Yogyakarta: Volcanological Survey of Indonesia, 1995. Text.