Gaya APA

Voight, B., Cornelius, R, R. (1993). Graphical and PC-Software Analysis of Volcano Eruption Precursors According to The Materials Failure Forecasting Method (FFM) (Tahun 1993). Bandung: Volcanological Survey of Indonesia.

Gaya MLA

Voight, Barry., Cornelius, Reinold, R.. "Graphical and PC-Software Analysis of Volcano Eruption Precursors According to The Materials Failure Forecasting Method (FFM)". Tahun 1993 Bandung: Volcanological Survey of Indonesia, 1993. Text.