De Blij, Harm J.
Physical geography of the global environment
John Wiley & Sons, 1993
Buku Teks
De Blij, Harm J.
Physical geography of the global environment
John Wiley & Sons, 1996
Buku Referensi
Strahler, Alan H.
Physical geography : science and systems of the human environment
John Wiley & Sons, 1997
Buku Teks
Knapp, Brian
Challenge of the human environment
Longman House, 1992
Buku Teks
Global change and challenge : geography for the 1990s / edited, Robert Bennet
Routledge, 1991
Buku Teks