Carl, S. (2014). Proliferation and implementation of prison ombudsmen: Comparative analysis of the prisons and probation ombudsmen for England and Wales and the Justizvollzugsbeauftragter des Landes Nordrhein-Westfalen. Peter Lang AG.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCarl, Sabine. Proliferation and Implementation of Prison Ombudsmen: Comparative Analysis of the Prisons and Probation Ombudsmen for England and Wales and the Justizvollzugsbeauftragter Des Landes Nordrhein-Westfalen. Frankfurt am Main, [Germany]: Peter Lang AG, 2014.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিCarl, Sabine. Proliferation and Implementation of Prison Ombudsmen: Comparative Analysis of the Prisons and Probation Ombudsmen for England and Wales and the Justizvollzugsbeauftragter Des Landes Nordrhein-Westfalen. Peter Lang AG, 2014.