Descrates, Rene
J.M. Dent & Sons , 1949
Buku Teks
Gorman, G.E., author
Grenwood Press, 1986
Buku Referensi
[publisher not identified], [date of publication not identified]
Buku Teks
edited by Paul Barry Clarke, Andrew Linzey
Routledge, 1996
Buku Referensi
Ahern, Barnabas M., author
Fides, 1963
Buku Teks