Thomas Clarkson (1787). “An Essay on the Slavery and Commerce of the Human Species: Particularly the African, Translated from a Latin Dissertation, which was Honoured with the First Prize, in the University of Cambridge, for the Year 1785, with Additions. [One Line from Livy]”, p.52
"Lisa See: Best-selling Author Talks Female Friendships, Adapting Her Novel To Film". Interview with Lucas Kavner, www.huffingtonpost.com. July 12, 2011.