Corbett, P. Scott; Janssen, Volker; Lund, John M.; Pfannestiel, Todd; Waskiewicz, Sylvie; Vickery, Paul (June 26, 2020). „3.3 English settlements in America. The Chesapeake colonies: Virginia and Maryland. The rise of slavery in the Chesapeake Bay Colonies“. U.S. history. OpenStax. Suarchyvuotas originalas August 8, 2020. Nuoroda tikrinta August 8, 2020.
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Corbett, P. Scott; Janssen, Volker; Lund, John M.; Pfannestiel, Todd; Waskiewicz, Sylvie; Vickery, Paul (June 26, 2020). „3.3 English settlements in America. The Chesapeake colonies: Virginia and Maryland. The rise of slavery in the Chesapeake Bay Colonies“. U.S. history. OpenStax. Suarchyvuotas originalas August 8, 2020. Nuoroda tikrinta August 8, 2020.