Solórzano, H. S., Numrich, C., & Boyd, F. (2006). NorthStar: Building skills for the TOEFL iBT High Intermediate. Teacher's manual with ETS scoring guide. White Plains, NY: Pearson Longman.
Stile di citazione ChicagoSolórzano, Helen S., Carol Numrich, e Frances Boyd. NorthStar: Building Skills for the TOEFL IBT High Intermediate. Teacher's Manual With ETS Scoring Guide. White Plains, NY: Pearson Longman, 2006.
Citazione MLASolórzano, Helen S., Carol Numrich, e Frances Boyd. NorthStar: Building Skills for the TOEFL IBT High Intermediate. Teacher's Manual With ETS Scoring Guide. White Plains, NY: Pearson Longman, 2006.
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