Bibliografía:

- Angell, S. (s.f.) Quakers: From Slave Traders to Early Abolitionists. PBS: This far by faith. https://www.pbs.org/thisfarbyfaith/journey_1/p_7.html#PrintPage

- Borthwick Institute for Archives (s.f.). Quakers and Slavery. University of York. https://www.york.ac.uk/borthwick/holdings/research-guides/race/quakers-and-slavery/

- Gerbner, K. (2019). Slavery in the Quaker World. Friends Journal. https://www.friendsjournal.org/slavery-in-the-quaker-world/