Cita APA (7a ed.)
Orr,William W. (1970). Are angels for real? (ed.). Scripture press.
Cita Chicago Style (17a ed.)
Orr,William W. Are Angels for Real? ed. Illinois: Scripture press, 1970.
Cita MLA (9a ed.)
Orr,William W. Are Angels for Real? ed. Scripture press, 1970.
Precaución: Estas citas no son 100% exactas.