Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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