Strahler, Arthur N.
Study guide for modern physical geography
John Wiley & Sons, 1983
 Buku Teks
Strahler, Arthur N.
Physical geography
John Wiley & Sons, 1975
 Buku Teks
Duckson, Don W.
Exercise in physical geography
McGraw-HIll, 1999
 Buku Teks
Strahler, Arthur N.
Lab manual for physical geography
John Wiley & Sons, 2004
 Buku Teks
Trewartha, Glenn T.
Physical elements of geography
McGraw-Hill, 1967
 Buku Teks