Davis, Robert. Christian Slaves, Muslim Masters: White Slavery in the Mediterranean, the Barbary Coast and Italy, 1500–1800.[1]
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Sumner, Charles (1847). White Slavery in The Barbary States. A Lecture Before The Boston Mercantile Library Association, Feb. 17, 1847. Boston: William D. Ticknor and Company. p. 4. ISBN978-1092289818. «I propose to consider the subject of White Slavery in Algiers, or perhaps is might be more appropriately called, White Slavery in the Barbary States. As Algiers was its chief seat, it seems to have acquired a current name for the place. This I shall not disturb; though I shall speak of white slavery, or the slavery of Christians, throughout the Barbary States.»
Sumner, Charles (1847). White Slavery in The Barbary States. A Lecture Before The Boston Mercantile Library Association, Feb. 17, 1847. Boston: William D. Ticknor and Company. p. 54. ISBN978-1092289818. «Among the concubines of a prince of Morocco were two slaves of the age of fifteen, one of English, and the other of French extraction. - Lampiere's Tour, p. 147. There is an account of "One Mrs. Shaw, an Irishwoman," in words hardly polite enough to be quoted. She was swept into the harem of Muley Shmael, who "forced her to turn moor";"but soon after, having taken a dislike to her, he gave her to a soldier." - Braithwaite's Morocco, p. 191.»
Lewis, Bernard (1992). Race and Slavery in the Middle East: An Historical Enquiry. Oxford University Press. pp. 7. ISBN978-0195053265. «[...] those who remained faithful to their old religions and lived as protected persons under Muslim rule could not, if free, be legally enslaved unless they had violated the terms of being a protected subject, the contract governing their status, as for example by rebelling against Muslim rule or helping the enemies of the Muslim state or, according to some authorities, by withholding payment of the agricultural or yearly tax, the taxes due from protected people to the Muslim state.»
María Luisa Candau Chacón; Mónica Bolufer Peruga; Alonso Manuel Macías Domínguez; Manuel José de Lara Ródenas; Sara López Villarán; Antonio José Couso Liañez; Marta Ruiz Sastre; Ofelia Rey Castelao; María José Álvarez Faedo; Tomás A. Mantecón Movellán; Rosario Márquez Macías; María Losada Friend; Clara Zamora Meca; Verónica Undurraga Schüler; Yéssica González Gómez; María José de la Pascua Sánchez (11 de mayo de 2016). Las mujeres y las emociones en Europa y América. Siglos XVII-XIX. Ed. Universidad de Cantabria. pp. 420-. ISBN978-84-8102-770-9.
Guzmán, Carmen Luz (2013). «Las cautivas de las Siete Ciudades: El cautiverio de mujeres hispanocriollas durante la Guerra de Arauco, en la perspectiva de cuatro cronistas (s. XVII)» [The captives of the Seven Cities: The captivity of hispanic-creole women during the Arauco's War, from the insight of four chroniclers (17th century)]. Intus-Legere Historia7 (1): 77-97. doi:10.15691/07176864.2014.0.94.
Prowse, Tracy L.; Schwarcz, Henry P.; Garnsey, Peter; Knyf, Martin; MacChiarelli, Roberto; Bondioli, Luca (2007). «Isotopic evidence for age-related immigration to imperial Rome». American Journal of Physical Anthropology132 (4): 510-519. PMID17205550. doi:10.1002/ajpa.20541.