De Blij, Harm J.
Human geography: culture, society, and space
John Wiley & Sons, 1995
 Buku Teks
De Blij, Harm J.
Human geography : culture, society, and space : fifth edition
John Wiley & Sons, 1995
 Buku Referensi
Davis, Kingsley, 1908-1997
Human society
Macmillan, 1949
 Buku Teks
Davis, Kingsley, 1908-1997
Human society
Macmillan, 1960
 Buku Teks
Davis, Kingsley, 1908-1997
Human society
Macmillan, 1964
 Buku Teks