Cita APA (7a ed.)

Tkachuk, B., & Walmsley, R. (2001). World prison population: Facts, trends and solutions. HEUNI papers.

Cita Chicago Style (17a ed.)

Tkachuk, Brian, y Roy Walmsley. "World Prison Population: Facts, Trends and Solutions." HEUNI Papers 2001.

Cita MLA (9a ed.)

Tkachuk, Brian, y Roy Walmsley. "World Prison Population: Facts, Trends and Solutions." HEUNI Papers, 2001.