Phillips, d. (2006). Longman preparation course for the toefl test: IBT. Pearson Education.
Citazione stile Chigago Style (17a edizione)Phillips, deborah. Longman Preparation Course for the Toefl Test: IBT. Pearson Education, 2006.
Citatione MLA (9a ed.)Phillips, deborah. Longman Preparation Course for the Toefl Test: IBT. Pearson Education, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.