Deborah Phillips. (2010). LongMan Preparation Course for the TOEFL Test: The Paper Test. Hà Nội: Từ điển Bách khoa.
Παραπομπή Chicago StyleDeborah Phillips. LongMan Preparation Course for the TOEFL Test: The Paper Test. Hà Nội: Từ điển Bách khoa, 2010.
Παραπομπή MLADeborah Phillips. LongMan Preparation Course for the TOEFL Test: The Paper Test. Hà Nội: Từ điển Bách khoa, 2010.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.