Cita APA

(2007). The official guide to the new TOEFL IBT (Second edition.). United States of America: McGraw-Hill.

Citación estilo Chicago

The Official Guide to the New TOEFL IBT. Second edition. United States of America: McGraw-Hill, 2007.

Cita MLA

The Official Guide to the New TOEFL IBT. Second edition. United States of America: McGraw-Hill, 2007.

Precaución: Estas citas no son 100% exactas.