Fellag, L. R., Boyd, F., & Numrich, C. (2006). NorthStar: Building skills for the TOEFL iBT Advanced. Teacher's manual with ETS scoring guide. White Plains, NY: Pearson Longman.
استشهاد بنمط شيكاغوFellag, Linda Robinson, Frances Boyd, و Carol Numrich. NorthStar: Building Skills for the TOEFL IBT Advanced. Teacher's Manual With ETS Scoring Guide. White Plains, NY: Pearson Longman, 2006.
MLA استشهادFellag, Linda Robinson, Frances Boyd, و Carol Numrich. NorthStar: Building Skills for the TOEFL IBT Advanced. Teacher's Manual With ETS Scoring Guide. White Plains, NY: Pearson Longman, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.