APA Style
National Geographic: May 2010. (2010).
USA:
National Geographic Society.
Chicago Style
National Geographic: May 2010.
May 2010.
USA:
National Geographic Society,
2010.
Perpustakaan KALBIS.
IEEE Style
*IEEE style untuk Skripsi
National Geographic: May 2010.
May 2010.
May 2010.
USA:
National Geographic Society.
*IEEE style untuk Buku/Jurnal
National Geographic: May 2010.
May 2010.
May 2010.
USA:
National Geographic Society,
2010.
MLA Style
National Geographic: May 2010.
May 2010.
USA:
National Geographic Society,
2010.
Perpustakaan KALBIS.
Turabian Style
National Geographic: May 2010.
USA:
National Geographic Society,
2010.
Perpustakaan KALBIS.