Kenward, L. R. (1987). The decline of the US steel industry. [s.n.].
Cita Chicago Style (17a ed.)Kenward, Lloyd R. The Decline of the US Steel Industry. [S.l.]: [s.n.], 1987.
Cita MLA (9a ed.)Kenward, Lloyd R. The Decline of the US Steel Industry. [s.n.], 1987.
Precaución: Estas citas no son 100% exactas.