Citazione Stile APA (7a Edizione)

ETS. (2016). OFFICIAL TOEFL iBT TESTS VOLUME 2 (WITH CD) (2ND ED.). MC GRAW HILL.

Citazione stile Chigago Style (17a edizione)

ETS. OFFICIAL TOEFL IBT TESTS VOLUME 2 (WITH CD). 2ND ED. NEW DELHI: MC GRAW HILL, 2016.

Citatione MLA (9a ed.)

ETS. OFFICIAL TOEFL IBT TESTS VOLUME 2 (WITH CD). 2ND ED. MC GRAW HILL, 2016.