Citazione Stile APA (7a Edizione)

Lougheed, L. (2011). Direct to TOEFL iBT: Student's book. Macmillan Education.

Citazione stile Chigago Style (17a edizione)

Lougheed, Lin. Direct to TOEFL IBT: Student's Book. [Bangkok, Thailand]: Macmillan Education, 2011.

Citatione MLA (9a ed.)

Lougheed, Lin. Direct to TOEFL IBT: Student's Book. Macmillan Education, 2011.