Slayden, Ellen Maury
New York: Harper & Row Publishers, [c1963]
Buku Teks
Nendeln : The Association of American Geographers
Majalah, Jurnal, Buletin
Buchwald, Art
[United State] : [publisher not identified], 1984,
Buku Teks
Mott, Frank Luther
New York The MacMillan Company 1947
Buku Teks
Ryfky Eka Putra, author
2010
UI - Skripsi (Open)