Gaya APA

al., E. et al (2015). Aspek Sosial Banjir Lahar (-). Yogyakarta: Gadjah Mada University Press.

Gaya MLA

al., Et. et al. "Aspek Sosial Banjir Lahar". - Yogyakarta: Gadjah Mada University Press, 2015. Text.