Morrison, John
This freedom
Penguin Books, 1985
 Buku Teks SO
Mendrofa, James Farlow
Eksistensialisme naturalistik: kajian perspektif naturalistik terhadap konsep eksistensialisme mengenai kebebasan dan faktisitas = Naturalistic existentialism: naturalistic perspective on the concepts of freedom and facticity of existentialism
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2011
 UI - Tesis Open
Fromm, Erich
Fear of freedom
Routledge Classics, 2001
 Buku Teks SO
Info Freedom
Jakarta : Freedom Institute, 2006,
 Majalah, Jurnal, Buletin
The future of freedom
Indian Committee for Cultural Freedom, 1999
 Buku Teks SO