edited by Alton Bryant
Minnesota , Billy Graham Evangelistic Association
Buku Referensi
Victoria Neufeldt, Andrew N. Sparks, editor
Simon & Schuster, 1989
Buku Referensi
Collins, 2002
Buku Referensi
Langenscheidt, 1993,
Buku Referensi
Clarendon Press, 1994
Buku Referensi