Kompas, 2002
Buku Teks
Soedjatmoko, 1922-1989, author
PLP2M, 1984
Buku Teks
Wallerstein, Immanuel, author
Lembaga Kajian Islam dan Studi (LKiS), 1997
Buku Teks
Labovitz, Sanford, author
McGraw-Hill, 1971.
Buku Teks
Hall, Robert B.
Science Research Council , 1947
Buku Teks