APA-referens (7:e uppl.)
Parshall, P. (1975). The fortress and the fire: Jesus Christ and the challenge of islam. Gospel literature service.
Chicago-referens (17:e uppl.)
Parshall, Phil. The Fortress and the Fire: Jesus Christ and the Challenge of Islam. Bombay: Gospel literature service, 1975.
MLA-referens (9:e uppl.)
Parshall, Phil. The Fortress and the Fire: Jesus Christ and the Challenge of Islam. Gospel literature service, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.