Gaya APA

Spilsbury, L, D, R., Sadovskii, L, E, S, A, A, L. (). MENGENAL BENCANA ALAM LONGSOR (1). : PT Bhuana Ilmu Populer.

Gaya MLA

Spilsbury, Louise, Dan, Richard., Sadovskii, L., E., Sadovskii, And, A., L.. "MENGENAL BENCANA ALAM LONGSOR". 1 : PT Bhuana Ilmu Populer, . Text.