Artikel Jurnal
Rahner, Karl, author
The Crossroad Publishing Company, 1981
Buku Referensi
Doyglas J. Davies, author
Berg, 2002
Buku Teks SO
edited by Alister E. McGrath
Blackwell, 2008
Buku Teks
Lynch, Gordon, author
Blackwell Publishing, 2005
Buku Teks