Herbert L Tyson. (1990). XyWrite revealed. New York: McGraw-Hill.
Trích dẫn kiểu ChicagoHerbert L Tyson. XyWrite Revealed. New York: McGraw-Hill, 1990.
MLA citiranjeHerbert L Tyson. XyWrite Revealed. New York: McGraw-Hill, 1990.
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