Gaya APA
GEOGRAPHIC, N. (2016).
National Geographic Traveler: Tur Terwahid Si Ular Besi, Berkereta Cumbui Pegunungan Rocky .
:
.
Gaya MLA
GEOGRAPHIC, NATIONAL.
"National Geographic Traveler: Tur Terwahid Si Ular Besi, Berkereta Cumbui Pegunungan Rocky".
:
,
2016.
Text.