McDonald, Bryan L., author
Oxford University Press, 2017
eBooks
De Blij, Harm J., author
Oxford, 2005
Buku Teks
Kasiyanto Kasemin, 1962-, author
Airlangga University Press, 1999
Buku Teks
edited by Muge Aknur
Universal-Publishers, 2012
Buku Teks
Happold, F.C.
Christophers, 1938
Buku Klasik