Habermas, Jurgen, author
MIT Press, 2001
Buku Teks
Diamond, Malcolm L.
McGraw-Hill, 1974
Buku Teks
Chambers, Iain, author
Routledge, 1990
Buku Teks
Yokori, Yossy Louisa, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2002
UI - Skripsi (Membership)
Iqbal, author
Bulan Bintang, 1978
Buku Teks