De Blij, Harm J., author
John Wiley & Sons, 1977
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1995
Buku Referensi
De Blij, Harm J., author
John Wiley & Sons, 1995
Buku Teks
Anne Buttimer, David Seamon, editors
Croom Helm, 1980
Buku Teks
Malinowski, Jon C., author
McGraw-Hill, 2012
Buku Teks