Russell, Bertrend
Unwin Paperbacks, 1963
Buku Teks
Varma, S.P., author
Radja Grafindo Persada, 2003
Buku Teks
Varma, S.P., author
Rajawali, 2010
Buku Teks
Varma, S.P., author
RajaGrafindo Persada, 1999, 2007
Buku Teks
edited by James C. Charlesworth
The Free Press, 1968
Buku Teks