Gaya APA
National Geographic Indonesia. (2021).
Jakarta:
Gramedia.
Gaya Chicago
National Geographic Indonesia.
6.2021.
Jakarta:
Gramedia,
2021.
Majalah.
Gaya MLA
National Geographic Indonesia.
6.2021.
Jakarta:
Gramedia,
2021.
Majalah.
Gaya Turabian
National Geographic Indonesia.
Jakarta:
Gramedia,
2021.
Majalah.