Cita APA (7th ed.)
Bull, G. T. (1955). When iron gates yield ([1st ed. reprinted].). Pickering and Inglis.
Cita Chicago (17th ed.)
Bull, Geoffrey T. When Iron Gates Yield. [1st ed. reprinted]. London: Pickering and Inglis, 1955.
Cita MLA (9th ed.)
Bull, Geoffrey T. When Iron Gates Yield. [1st ed. reprinted]. Pickering and Inglis, 1955.
Atenció: Aquestes cites poden no estar 100% correctes.