Urbom, R. (1998). Oxford American wordpower dictionary. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoUrbom, Ruth. Oxford American Wordpower Dictionary. Oxford: Oxford University Press, 1998.
MLA引文Urbom, Ruth. Oxford American Wordpower Dictionary. Oxford: Oxford University Press, 1998.
警告：這些引文格式不一定是100％准確.