Swann, M. (1978). The BBC's external services under threat? BBC.
Cita Chicago Style (17a ed.)Swann, Michael. The BBC's External Services Under Threat? London: BBC, 1978.
Cita MLA (9a ed.)Swann, Michael. The BBC's External Services Under Threat? BBC, 1978.
Precaución: Estas citas no son 100% exactas.