Simmel, Georg
Buku Teks
Vierkandt, Alfred, 1867-1953, author
Stuttgart, Ferdinand Enke Verlag
Buku Referensi
New York : The American College
Majalah, Jurnal, Buletin
Laiden : Brill Academic Publishers
Majalah, Jurnal, Buletin
Giddens, Anthony, author
Cambridge Polity Press 1989,
Buku Teks