Gaya APA

BEMMELEN, R, V. (1943). Bandoeng Tisitutyosazyo XII th Report on The Merapi Eruption Cycle 2602 - 2603 September - October 2603 (1943) (Tahun 1943). Bandung: U.S Geological Survey.

Gaya MLA

BEMMELEN, R.W., VAN. "Bandoeng Tisitutyosazyo XII th Report on The Merapi Eruption Cycle 2602 - 2603 September - October 2603 (1943)". Tahun 1943 Bandung: U.S Geological Survey, 1943. Text.