Gregory, Steven (1994). Gregory, Steven; Sanjek, Roger (eds.). Race (illustrated, reprint ed.). Rutgers University Press. p. 123. ISBN978-0-8135-2109-1. Archived from the original on 26 March 2021. Retrieved 17 May 2014.
Gregory, Steven (1994). Gregory, Steven; Sanjek, Roger (eds.). Race (illustrated, reprint ed.). Rutgers University Press. p. 123. ISBN978-0-8135-2109-1. Archived from the original on 26 March 2021. Retrieved 17 May 2014.