Cita APA (7th ed.)
Bell, R. (1968). The origin of islam in its christian enviroment. Univ Press.
Cita Chicago (17th ed.)
Bell, Richard. The Origin of Islam in Its Christian Enviroment. Edinburgh: Univ Press, 1968.
Cita MLA (9th ed.)
Bell, Richard. The Origin of Islam in Its Christian Enviroment. Univ Press, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.