Gaya APA
Sudrajat, A. (2009).
The Development of Volcanological Investigations in Indonesia .
Bandung:
Universitas Padjajaran Press.
Gaya MLA
Sudrajat, Adjat.
"The Development of Volcanological Investigations in Indonesia".
Bandung:
Universitas Padjajaran Press,
2009.
Text.