APA-viite (7. p.)
Parshall, P. (1975). The fortress and the fire: Jesus Christ and the challenge of islam. Gospel literature service.
Chicago-viite (17. p.)
Parshall, Phil. The Fortress and the Fire: Jesus Christ and the Challenge of Islam. Bombay: Gospel literature service, 1975.
MLA-viite (9. p.)
Parshall, Phil. The Fortress and the Fire: Jesus Christ and the Challenge of Islam. Gospel literature service, 1975.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.