Association for Civil Society Development in azerbaijin, 2008
Majalah, Jurnal, Buletin
Wolke, Robert L.
Gramedia Pustaka Utama, 2003
Buku Teks SO
Kuhn, Thomas S.
The University of Chicago Press, [c1970]
Buku Teks SO
Singer, Charles
Clarendon Press, 1962
Buku Teks SO
Gillispie, Charles Coulston
Princeton University Press, 1960
Buku Teks SO