1. Anonymous(2020) “Announcement of the 2020 Pulitzer Prize Winners.”https://www.pulitzer.org/news/announcement-2020-pulitzer-prize-winners.
2. Gines K. T.(2015) “Anna Julia Cooper.” InE. N.Zalta(ed.) The Stanford Encyclopedia of Philosophy(Summer 2015 edn.).https://plato.stanford.edu/archives/sum2015/entries/anna-julia-cooper/.
3. Ireland C.(2013) “When King Came to Harvard.”Harvard Gazette 16 January.https://news.harvard.edu/gazette/story/2013/01/when-king-came-to-harvard/.
4. Y Chromosome STR Haplotypes and the Genetic Structure of US Populations of African, European, and Hispanic Ancestry;Kayser M.;Genome Research,2003