Paterson, K. (1995). Grammar spectrum 1: Elementary with aswers. Oxford: Oxford Univ. Press.
Trích dẫn kiểu ChicagoPaterson, Ken. Grammar Spectrum 1: Elementary With Aswers. Oxford: Oxford Univ. Press, 1995.
Deismireacht MLAPaterson, Ken. Grammar Spectrum 1: Elementary With Aswers. Oxford: Oxford Univ. Press, 1995.
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