Duindam, Jeroen (2016). Dynasties A Global History of Power, 1300-1800. Cambridge University Press. էջ 196. ISBN9781107060685. «Dikici, 'Making of Ottoman court eunuchs', makes clear that white eunuchs could be recruited among devshirme boys, with the pages and their eunuch supervisors coming from the same background. They were sometimes castrated in the palace, whereas the harem's black eunuchs were more often castrated in their region of origin.»
