Cita APA (7a ed.)

Walmsley, R. (1997). Prison populations in Europe and North America: Some background information. HEUNI papers.

Cita Chicago Style (17a ed.)

Walmsley, Roy. "Prison Populations in Europe and North America: Some Background Information." HEUNI Papers 1997.

Cita MLA (8a ed.)

Walmsley, Roy. "Prison Populations in Europe and North America: Some Background Information." HEUNI Papers, 1997.