Barker, J. A. (1992). Future edge. New York: William Morrow and Company.
Trích dẫn kiểu ChicagoBarker, Joel Arthur. Future Edge. New York: William Morrow and Company, 1992.
MLA引文Barker, Joel Arthur. Future Edge. New York: William Morrow and Company, 1992.
警告：这些引文格式不一定是100％准确.