Gaya APA
Geographic, T, N. (2020).
Natioanal Geographic Indonesia Ed. Desember 2020 (Desember 2020).
Jakarta:
National Geographic.
Gaya MLA
Geographic, Tim, National.
"Natioanal Geographic Indonesia Ed. Desember 2020".
Desember 2020
Jakarta:
National Geographic,
2020.
Text.