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Síntese de Indicadores Sociais 2003(PDF). Síntese de Indicadores Sociais 2003. Instituto Brasileiro de Geografia e Estatística (Brazil). 2004-04 [2007-05-15]. (原始内容存档(PDF)于2018-12-26).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 29. 1999-05-27 [2007-01-11]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 11. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 13. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 14. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 38. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 29. 1999-05-27 [2007-01-11]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 11. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 13. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 14. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Richards, Patsy. Homicide statistics, research paper 99/56(PDF). House of commons library, Social and general statistics section: 38. 1999-05-27 [2006-12-30]. (原始内容存档(PDF)于2011-05-06).
Jackson, Lorena D. Comparative criminology: Botswana. A comparative criminology tour of the world. San Diego State University. [2007-12-10]. (原始内容存档于2013-03-26).
Síntese de Indicadores Sociais 2003(PDF). Síntese de Indicadores Sociais 2003. Instituto Brasileiro de Geografia e Estatística (Brazil). 2004-04 [2007-05-15]. (原始内容存档(PDF)于2018-12-26).
Kwing Hung. Firearm crimes, Canada vs. U.S.. Comparison of homicides, U.S. and Canada, 1987-1996. Canada Firearms Centre. 1998-05-13 [2006-12-09]. (原始内容存档于2006-10-21).
Jackson, Lorena D. Comparative criminology: Botswana. A comparative criminology tour of the world. San Diego State University. [2007-12-10]. (原始内容存档于2013-03-26).