Wendy Warren (2016). New England Bound(en inglés) (1.ª edición). W. W. Norton & Company. p. 8. ISBN978-0-87140-672-9. «Published in 1700, Sewall’s essay, The Selling of Joseph, was New England’s first antislavery tract […] Sewall found hipocrisy in colonists’ lamenting the treatment of their friends and family in North Africa».
Sewall, Samuel. «Samuel Sewall – The Selling of Joseph (1700)». Slavery, Law & Power In the British Empire and Early America(en inglés) (University of Maryland). Consultado el 1 de abril de 2024. «when we are bemoaning the barbarous Usage of our Friends and Kinsfolk in Africa: it might not be unseasonable to enquire whether we are not culpable in forcing the Africans to become Slaves amongst our selves».