Gaya APA
Hadikusumo, D.
(1972).
Workshop on Natural Resources
(
September 1972)
.
Bandung:
Dinas Vulkanologi.
Gaya MLA
Hadikusumo, Djajadi.
"Workshop on Natural Resources".
September 1972
Bandung:
Dinas Vulkanologi,
1972.
Text.