Hunter, R. (1985). The fourth angel. Macmillan.
Cita Chicago (17th ed.)Hunter, Rob. The Fourth Angel. London: Macmillan, 1985.
Cita MLA (8th ed.)Hunter, Rob. The Fourth Angel. Macmillan, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)