Παραπομπή APA

Beaumont, J. (2006). NorthStar: Building skills for the TOEFL iBT : Intermediate. White Plains, N.Y: Pearson Longman in cooperationwith ETS.

Παραπομπή Chicago Style

Beaumont, John. NorthStar: Building Skills for the TOEFL IBT : Intermediate. White Plains, N.Y: Pearson Longman in cooperationwith ETS, 2006.

Παραπομπή MLA

Beaumont, John. NorthStar: Building Skills for the TOEFL IBT : Intermediate. White Plains, N.Y: Pearson Longman in cooperationwith ETS, 2006.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.