APA Style
National Geographic: July 2007. (2007).
United States:
National Geographic Society.
Chicago Style
National Geographic: July 2007.
July 2007.
United States:
National Geographic Society,
2007.
Perpustakaan KALBIS.
IEEE Style
*IEEE style untuk Skripsi
National Geographic: July 2007.
July 2007.
July 2007.
United States:
National Geographic Society.
*IEEE style untuk Buku/Jurnal
National Geographic: July 2007.
July 2007.
July 2007.
United States:
National Geographic Society,
2007.
MLA Style
National Geographic: July 2007.
July 2007.
United States:
National Geographic Society,
2007.
Perpustakaan KALBIS.
Turabian Style
National Geographic: July 2007.
United States:
National Geographic Society,
2007.
Perpustakaan KALBIS.