APA Style
Siregar, E. (2008).
National Geographic Indonesia: Mei 2008 (China, di Balik Sang Naga) .
Jakarta:
National Geographic Society.
MLA Style
Siregar, Elwin.
"National Geographic Indonesia: Mei 2008 (China, di Balik Sang Naga)".
Jakarta:
National Geographic Society,
2008.
Text.