Gaya APA
National Geographic Oktober 2017 - Delta Kayan Sembakung. (2016).
USA:
National Geographic Society.
Gaya Chicago
National Geographic Oktober 2017 - Delta Kayan Sembakung.
.
USA:
National Geographic Society,
2016.
Text.
Gaya MLA
National Geographic Oktober 2017 - Delta Kayan Sembakung.
.
USA:
National Geographic Society,
2016.
Text.
Gaya Turabian
National Geographic Oktober 2017 - Delta Kayan Sembakung.
USA:
National Geographic Society,
2016.
Print.