Gaya APA

Matahelumual, J. (1978). Ad Hoc Working Group on Volcanic Emergencies Unesco Headquartes, Paris 22 - 25 August 1978 Report on Proceedings (Agustus 1978). Bandung: Geological Survey Of Indonesia.

Gaya MLA

Matahelumual, J.. "Ad Hoc Working Group on Volcanic Emergencies Unesco Headquartes, Paris 22 - 25 August 1978 Report on Proceedings". Agustus 1978 Bandung: Geological Survey Of Indonesia, 1978. Text.