De Blij, Harm J.
Physical geography of the global environment
John Wiley & Sons, 1996
 Buku Referensi
De Blij, Harm J.
Physical geography of the global environment
John Wiley & Sons, 1993
 Buku Teks SO
Briggs, David J.
Agriculture and environment: the physical geography of temperature agriculture systems
Longman Scientific & Technical, 1994
 Buku Teks
Strahler, Alan H.
Physical geography : science and systems of the human environment
John Wiley & Sons, 1997
 Buku Teks SO
Devins, Delbert W.
Energy: its physical impact on the environment / Delbert W. Devins
John Wiley & Sons, 1982
 Buku Teks