Beaumont, J., Boyd, F., & Numrich, C. (2006). NorthStar: Building skills for the TOEFL iBT Intermediate. Teacher's manual . ETS practice sets 1-4. Benchmark and practice responses. White Plains, NY: Pearson Longman.
Chicago-tyylinen lähdeviittausBeaumont, John, Frances Boyd, ja Carol Numrich. NorthStar: Building Skills for the TOEFL IBT Intermediate. Teacher's Manual . ETS Practice Sets 1-4. Benchmark and Practice Responses. White Plains, NY: Pearson Longman, 2006.
MLA-viiteBeaumont, John, Frances Boyd, ja Carol Numrich. NorthStar: Building Skills for the TOEFL IBT Intermediate. Teacher's Manual . ETS Practice Sets 1-4. Benchmark and Practice Responses. White Plains, NY: Pearson Longman, 2006.
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