MacGinn, E. M. (1990). Inmate labor at the Colorado State Penitentiary, 1871 - 1940.
Cita Chicago Style (17a ed.)MacGinn, Elinor M. Inmate Labor at the Colorado State Penitentiary, 1871 - 1940. 1990.
Cita MLA (8a ed.)MacGinn, Elinor M. Inmate Labor at the Colorado State Penitentiary, 1871 - 1940. 1990.
Precaución: Estas citas no son 100% exactas.