Strahler, Arthur N.
Physical geography
John Wiley & Sons, 1975
 Buku Teks
Petersen, James F.
Physical geography
Brooks/Cole Cengage Learning, 2012
 Buku Teks SO
Whittow, John B.
The Penguin dictionary of physical geography
Allen Lane, 1984
 Buku Referensi
Blij, Harm J.. de
Physical geography of the global environment
John Wiley & Sons, 1996
 Buku Referensi
Trewartha, Glenn T.
Elements of geography : physical and cultural
McGraw-Hill, 1967
 Buku Teks SO