Rothman, Stanley
European Society and politics
Bobbs-Merrill, 1970
Buku Teks SO
Gunther, John, 1901-1970
Inside Europe today
Harper & Brother, 1962
Buku Teks SO
Gunther, John, 1901-1970
Inside Europe today
Harper & Brothers, 1961
Buku Teks SO
Documents On European Government
edited by Steven Muller
Macmillan, 1963
Buku Teks SO
Cook, Chris
European political facts 1848 -1918
Macmillan, 1978
Buku Referensi