Gaya APA
Hadikusumo, D. (1957).
Bulletin of the Volcanological Survey of Indonesia for the Period 1950 - 1957 .
Bandung:
Djawatan Geologi.
Gaya MLA
Hadikusumo, Djajadi.
"Bulletin of the Volcanological Survey of Indonesia for the Period 1950 - 1957".
Bandung:
Djawatan Geologi,
1957.
Text.