Jay Maurer. (2001). Focus on grammar: An advance course for reference and practice (Teacher's manual). White Plains, NY: Pearson Education.
Chicago-tyylinen lähdeviittausJay Maurer. Focus On Grammar: An Advance Course for Reference and Practice (Teacher's Manual). White Plains, NY: Pearson Education, 2001.
MLA-viiteJay Maurer. Focus On Grammar: An Advance Course for Reference and Practice (Teacher's Manual). White Plains, NY: Pearson Education, 2001.
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