Gaya APA
Somantri, L., Huda, N. (2013).
Advanced Learning Geography 1 for Grade X Senior High School Social Programme .
Bandung:
Grafindo.
Gaya MLA
Somantri, Lili., Huda, Nurul.
"Advanced Learning Geography 1 for Grade X Senior High School Social Programme".
Bandung:
Grafindo,
2013.
Text.