Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Referensi
Macleod, Janice, author
Gramedia Pustaka Utama, 2017
Buku Teks
Lewis, C.S., author
The Centenary Press, 1946
Buku Teks
Islamabad : Islamic Research Institute
Majalah, Jurnal, Buletin
Majalah, Jurnal, Buletin