Hyde, Simeon
Composition of the essay
Addison-Wesley Publishing Company, Inc., 1967
 Buku Teks
Roek, Jan de, author
Verzamelde Essay
Pink Editions & Productions, 1980
 Buku Teks
Shoen, Harriet H.
Land of liberty / Harriet H. Shoen
The L. W. Singer Company, 1955
 Buku Teks
Leiser, Burton M.
Liberty, justice, and morals contemporaryvalue conflicts
Macmillan Publishing Company, 1986
 Buku Teks
Croce, Benedetto
History as the story of liberty / Benedetto Croce
George Allen and Unwin, 1949
 Buku Teks
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