United Nations Agreements and Guidance materials

• Convention against Torture and Other Cruel, Inhuman or Degrading Treatment of Punishment
• Optional Protocol to the Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment
• Principles relating to the Status of National Institutions for the Promotion and Protection of Human Rights (the so-called Paris Principles)
• Standard Minimum Rules for the Treatment of Prisoners
• Basic Principles for the Treatment of Prisoners
• Standard Minimum Rules for the Administration of Juvenile Justice (the so-called Beijing Rules)
• Rules for the Protection of Juveniles Deprived of their Liberty
• The United Nations Code of Conduct for Law Enforcement Officials
• Principles of Medical Ethics relevant to the Role of Health Personnel, particularly Physicians, in the Protection of Prisoners and Detainees against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment
• Principles for the Protection of Persons with Mental Illness and the Improvement of Mental Health Care 
• Basic Principles on the Use of Force and Firearms by Law Enforcement Officials
• Basic Principles on the Role of Lawyers

Council of Europe

• Standards of the European Committee for the Prevention of Torture and Inhuman or Degrading Treatment or Punishment

Guidance materials prepared by non-governmental organisations

• Making Standards Work: An International Handbook on Good Prison Practice
• What is OPCAT?
• Guidance materials by APT
• A Handbook on State Obligations under the UN Convention against Torture

Academic literature

• Foley, C., Combating Torture Handbook: A Manual for Judges and Prosectors, Human Rights Centre of the University of Essex, 2003
• Giffard, Camille, The Torture Reporting Handbook: How to Document and Respond to Allegations of Torture within the International System for the Protection of Human Rights, Human Rights Centre, University of Essex, 2000