Gaya APA
Sriwanto, S., Nugroho, B.
(2003).
Geografi Regional Asia Tenggara
.
Purwokerto:
FKIP UMP.
Gaya MLA
Sriwanto, Sigid., Nugroho, Bambang.
"Geografi Regional Asia Tenggara".
Purwokerto:
FKIP UMP,
2003.
Text.