edited by Noel Castree, David Demeritt, DianaLiverman, Bruce Rhoads
Wiley-Blackwell, 2009
Buku Referensi
Brown, Tim, author
Wiley Blackwell, 2010
Buku Teks
edited by John A. Agnew, James S. Duncan
Wiley-Blackwell, 2011
Buku Teks
Strahler, Alan A., author
John Wiley & Sons, 1996
Buku Teks
Marsh, William M., author
John Wiley & Sons, 1996
Buku Teks