Heintzelman, Oliver H.
World regional geography
Prentice-Hall, 1965
 Buku Teks
World geography
edited by Otis W. Freeman and John W. Morris
McGraw-Hill, 1958
 Buku Teks
Jackson, Richard H.
World regional geography: issues for today
Wiley, 1986
 Buku Teks
Jackson, Richard H.
World regional geography : issues for today
John Wiley & Sons, 1982
 Buku Teks
Jackson, Richard H.
World regional geography : issues for today
Wiley Eastern Limited, 1986
 Buku Teks