Walmsley, R., & Joutsen, M. (1998). Prison populations in Europe and North America: Problems and solutions. Penological information bulletin, 21, 104-112.
Cita Chicago Style (17a ed.)Walmsley, Roy, y Matti Joutsen. "Prison Populations in Europe and North America: Problems and Solutions." Penological Information Bulletin 21 (1998): 104-112.
Cita MLA (8a ed.)Walmsley, Roy, y Matti Joutsen. "Prison Populations in Europe and North America: Problems and Solutions." Penological Information Bulletin, vol. 21, 1998, pp. 104-112.
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