Garland , 1993
Buku Teks
Muhamad Andrian Kamil, author
2012
UI - Tesis (Open)
Westview Press 1988, 1988
Buku Teks
Tuah Arieyanda Setiawan, author
Universitas Indonesia, 2009
UI - Skripsi (Open)
Mott, Frank Luther
New York The MacMillan Company 1947
Buku Teks