APA Style
National Geographic, National Geographic. (2019).
National Geographic; Juni 2019 .
Jakarta:
National Geographic.
Chicago Style
National Geographic, National Geographic.
National Geographic; Juni 2019.
Jakarta:
National Geographic,
2019.
.
MLA Style
National Geographic, National Geographic.
National Geographic; Juni 2019.
Jakarta:
National Geographic,
2019.
.
Turabian Style
National Geographic, National Geographic.
National Geographic; Juni 2019.
Jakarta:
National Geographic,
2019.
.