Παραπομπή APA

Fellag, L. R. (2006). NorthStar: Building skills for the TOEFL iBT Advanced. White Plains, NY: Pearson Longman in cooperation with ETS.

Παραπομπή Chicago Style

Fellag, Linda Robinson. NorthStar: Building Skills for the TOEFL IBT Advanced. White Plains, NY: Pearson Longman in cooperation with ETS, 2006.

Παραπομπή MLA

Fellag, Linda Robinson. NorthStar: Building Skills for the TOEFL IBT Advanced. White Plains, NY: Pearson Longman in cooperation with ETS, 2006.

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