Mill, J.S.
Penguin Books, 1987
Buku Teks
Whitehead, Alfred North, 1861-1947, author
The Free Press , 1968
Buku Teks
Santayana, George, author
Columbia University Press, 1995
Buku Teks
Camus, Albert, 1913-1960, author
Vintage Books, 1955
Buku Teks
Greene, Graham, author
Viking Press , 1951
Buku Teks