Serle, Geoffrey
Melbourne University Press in association with Monash University, 1982
Buku Referensi
Ross, Lloyd
Macmillan, 1977
Buku Teks
Craven, Paul R.
Dickenson Publishing, 1968
Buku Teks
Peeters, Benoît, 1956-
Polity Press, 2013
Buku Teks
Berg, A.Scott
Riverhead Books, 1989
Buku Teks