Hutchinson & Co., 1958
Buku Teks
Faculty of Geography, Gadjah Mada University, 1998
Majalah, Jurnal, Buletin
Trident Press Ltd, 2006
Majalah, Jurnal, Buletin
Hendy Soesilo, author
Balai Arkeologi D.I. Yogyakarta, 2016
Artikel Jurnal
De Blij, Harm J., author
John Wiley & Sons, 1994
Buku Teks