APA (7th ed.) Zitazioa
Phillips, D. Longman Preparation Course for the TOEFL Test: Next Generation IBT. Pearson.
Chicago Style (17th ed.) Zitazioa
Phillips, Deborah. Longman Preparation Course for the TOEFL Test: Next Generation IBT. Nueva York, EUA: Pearson.
MLA (9th ed.) Zitazioa
Phillips, Deborah. Longman Preparation Course for the TOEFL Test: Next Generation IBT. Pearson.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.