Corbett, Michael,
Political tolerance in America : freedom and equality in public attitudes /​ Michael Corbett.
Longman, 1982.
 Buku Teks
Non-plan : essays on freedom participation and change in modern architecture and urbanism
edited by Jonathan Hughes & Simon Sadler
Architectural Press, 2000
 Buku Teks SO
Leur, J. C. van (Jacob Cornelis), 1908-1942
Indonesian trade and society essays in Asian social and economic history /​ by J.C. van Leur.
W. Van Hoeve Publishers, 1967
 Buku Teks
Morrison, John
This freedom
Penguin Books, 1985
 Buku Teks SO
Zweig, Arnold
Essays
Berlin Aufbau 1959
 Buku Teks