Maritain, Jacques
The University of Chicago Press, 1951
Buku Teks
Strong, C. F., author
Nuansa, 2004
Buku Teks
Strong, C.F., author
Sidgwick & Jackson Limited, 1960
Buku Teks
Pennings, Paul
Sage Publications, 1999
Buku Teks
Munawir Sjadzali, author
INIS, 1991
Buku Teks