Eisenstadt, Shmuel Noah
John Wiley , 1965
Buku Teks SO
Fried, Robert C.
Macmillan, 1968
Buku Teks SO
Brady, Alexander
University of Toronto Press, 1948
Buku Teks SO
Koopmans, Tim
Cambridge University Press, 2003
Buku Teks
Heydebrand, Wolf V.
Prentice Hall Inc., 1973
Buku Teks