Eisenstadt, Shmuel Noah
Modernization: protest and change
Prentice-Hall, 1966
 Buku Teks SO
Brailsford, D.F.
Introductory algol 68 programming
Ellis Horwood, 1979
 Buku Teks SO
Pagan, Frank G.
A Practical guide to Algol 68
John Wiley & Sons, 1976
 Buku Teks SO
Price and Protest: Ethnic Roots in America
edited by Jay Schlman, Aubrey Shatter, Rosalie Ehrlich
A Laurel Edition, 1977
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Andrain, Charles F.
Political protest and social change : analyzing politics
Macmillan, 1995
 Buku Teks SO