W. E. B. Du Bois (2014). “Black Folk Then and Now (The Oxford W.E.B. Du Bois): An Essay in the History and Sociology of the Negro Race”, p.174, Oxford University Press
William Makepeace Thackeray (1871). “Miscellanies: The memoirs of Barry Lyndon. The history of Samuel Titmarsh and the great Hoggarty diamond. Burlesques”, p.438