https://www.amnesty.org/en/latest/campaigns/2015/11/torture-in-china-who-what-why-and-how/
https://www.businessinsider.com/alleged-torture-in-chinas-laojiao-2013-4
https://www.bbc.com/news/world-asia-china-34786336
https://museumofcommunistterror.com/the-cultural-revolution/
https://www.chinafile.com/library/nyrb-china-archive/how-reds-smashed-reds
https://www.chinafile.com/library/nyrb-china-archive/how-reds-smashed-reds
https://repository.library.georgetown.edu/handle/10822/712458
https://www.ncbi.nlm.nih.gov/books/NBK481738/#:~:text=Hanging%20in%20Chains%20as%20a,was%20used%20for%20heinous%20murders.
https://www.visitnesm.org.uk/post/time-and-punishment-the-victorian-view
https://web.archive.org/web/20190113154234/https://www.amnesty.org/en/latest/news/2018/11/saudi-arabia-reports-of-torture-and-sexual-harassment-of-detained-activists/
https://www.doge-palace-tickets.com/venice-prisons-piombi-and-pozzi/
https://cvltnation.com/mongols-executed-enemies-no-blood-spilled/
https://www.venetoinside.com/en/news-and-curiosities/cell-no-10-in-the-pozzi-prison-of-the-doges-palace-in-venice
https://www.rct.uk/collection/2102216/little-ease-torture-cell-beneath-the-white-tower
https://www.britannica.com/topic/Falun-Gong
https://research.colonialwilliamsburg.org/Foundation/journal/spring03/branks.cfm
https://web.viu.ca/davies/H325%20Civil%20War/Experiences.POW.Confederate.htm
https://spokanehistorical.org/items/show/681
https://allthatsinteresting.com/drunkards-cloak
https://books.google.co.th/books?id=dhsvAAAAMAAJ&redir_esc=y
https://www.timeout.com/uk/news/can-you-guess-the-heaviest-drinking-city-in-the-uk-090723
https://archive.org/details/curiouspunishme01earlgoog
https://www.bbc.co.uk/ahistoryoftheworld/objects/04G2X6rXSsiAvbotujleew#:~:text=The%20Crank%20was%20a%20piece,to%2015%2C000%20times%20a%20day.
https://www.cbsnews.com/news/abuse-of-iraqi-pows-by-gis-probed/
https://www.ucpress.edu/blog-posts/51234-tiger-cages-in-vietnam-how-the-call-for-u-s-prison-abolition-is-a-global-issue
https://www.ncbi.nlm.nih.gov/books/NBK481738/#:~:text=Hanging%20in%20Chains%20as%20a,was%20used%20for%20heinous%20murders.
https://www.nytimes.com/1973/03/03/archives/4-south-vietnamese-describe-torture-in-prison-tiger-cage-center-of.html
https://dogespalacevenice.com/doges-palace-venice-prisons/
https://novayagazeta.ru/articles/2018/07/20/77222-10-minut-v-klasse-vospitatelnoy-raboty
https://web.archive.org/web/20150212220425/http://www.inverarayjail.co.uk/the-jails-story/life-in-jail.aspx
https://en.wikisource.org/wiki/1911_Encyclop%C3%A6dia_Britannica/Cangue
https://en.wikipedia.org/wiki/Boxer_Rebellion