Gaya APA
Kasim, D, K. (2018).
National Geographic Indonesia: April 2018 (Hanya Sebatas Warna Kulit) .
Jakarta:
National Geographic Society.
Gaya MLA
Kasim, Didi, Kasipi.
"National Geographic Indonesia: April 2018 (Hanya Sebatas Warna Kulit)".
Jakarta:
National Geographic Society,
2018.
Text.