Nasional Geographic, 2009
Buku Teks
National Geographic Partners, {s.a.}
Majalah, Jurnal, Buletin
Gramedia Percetakan, {s.a.}
Majalah, Jurnal, Buletin
Macdonald, Phil, author
National Geographic, 2009
Buku Teks
edited by Michael Pacione.
Barnes & Noble Books, [1983;1983;1983;1983;1983, 1983]
Buku Teks