Sawer, Geoffrey, 1910-1996
Clarendon Press, 1965
Buku Teks
Unger, Roberto Mangabeira
Free Press, 1976
Buku Teks
Aubert, Vilhelm
Martin Robertson & Company, 1983
Buku Teks
edited by Roger Cotterrell
Ashgate/Dartmouth, 2001
Buku Teks
Roger Cotterrell
Ashgate/Dartmouth, 2001
Buku Teks