Beaumont, J., Boyd, F., & Numrich, C. (2006). NorthStar: Building skills for the TOEFL iBT Intermediate. Teacher's manual with ETS scoring guide. White Plains, NY: Pearson Longman.
استشهاد بنمط شيكاغوBeaumont, John, Frances Boyd, و Carol Numrich. NorthStar: Building Skills for the TOEFL IBT Intermediate. Teacher's Manual With ETS Scoring Guide. White Plains, NY: Pearson Longman, 2006.
MLA استشهادBeaumont, John, Frances Boyd, و Carol Numrich. NorthStar: Building Skills for the TOEFL IBT Intermediate. Teacher's Manual With ETS Scoring Guide. White Plains, NY: Pearson Longman, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.