Brennan, Maynard, author
D.C Heat And Company, 1978
Buku Referensi
edited by Thomas M. Paikeday
Holt, Rinehart and Winston, 1976
Buku Referensi
edited by Alton Bryant
Minnesota , Billy Graham Evangelistic Association
Buku Referensi
edited by Jane A. Aaron
St. Martin's Press, 1987
Buku Teks
Armacost, David L., author
Marcel Dekker, 1981
Buku Teks