Gaya APA
(Majalah) National geographic. (2019).
:
National Geographic.
Gaya Chicago
(Majalah) National geographic.
Agustus 2019.
:
National Geographic,
2019.
Text.
Gaya MLA
(Majalah) National geographic.
Agustus 2019.
:
National Geographic,
2019.
Text.
Gaya Turabian
(Majalah) National geographic.
:
National Geographic,
2019.
Print.