Orr, E. W. (1987). Twice as less: Black English and the performance of black students in mathematics and science. Norton.
Chicago Style (17th ed.) CitationOrr, Eleanor Wilson. Twice as Less: Black English and the Performance of Black Students in Mathematics and Science. New York: Norton, 1987.
MLA (9th ed.) CitationOrr, Eleanor Wilson. Twice as Less: Black English and the Performance of Black Students in Mathematics and Science. Norton, 1987.
Warning: These citations may not always be 100% accurate.